I would like to function normally in relation to the world on having a relationship with someone, yet I am incapable of doing so apparently.
Well, you have written something productive here, and something unproductive.
First, the good news: you recognized that having a relationship is a desire/goal that you have. Some here have decided that a relationship is not their goal/desire. Either is fine, but many folks are still lingering in uncertainty. Ultimately, you either want to share your life with someone, or you don't (or you do but regard the price as too high, in which case you really don't).
Now the bad news: a defeatist attitude won't get you anywhere close to this goal. You say that you are incapable of this, and I tell you that this is a self-fulfilling prophesy. If you want a relationship, then this is an attainable goal. It will require hard work, strategy, compromise, and change, but it can be done. I promise you this, though: out there right now is someone who is looking for the same thing you are and having just as much trouble attaining it.
I am not rich, or good looking, or a "smooth" talker.
Most people aren't rich. "Good looking" is subjective, and "smooth talking" isn't so much necessary as basic social skills, which can be learned if you really want.
I like to let my beard grow,
This fondness of your beard - is your beard more important to you than your stated goal of having a relationship? If so, then this reminds me of a story...
My buddy, let's call him Oscar, likes his Dragonball-Z collector's shirt and jeans. He liked video-game themed clothing. He couldn't get a date.
He asked me to give him some tips since, back in college, I rarely had a weekend without a date (by contrast, in HS, I couldn't get one to save my life - live, learn, improve.).
I took Oscar to the mall along with a girl I was dating at the time, lets call her Lucy. I told him to try some stuff on that wasn't video-game themed.
He felt like and idiot in everything he tried on at the mall even after both I and (more importantly) Lucy told him he looked much better in a J-Crew sweater than in a Dragonball-Z shirt. He stubbornly refused to make a single change to his wardrobe. He is still single today.
You see Lucy didn't mind that Oscar liked anime and/or video games, but she confessed to me later that she wouldn't want to go to dinner with a guy who wears his hobbies (it would be different if they were at a convention), and neither would any of her friends (I asked her to help me set Oscar up).
Did Oscar make the "wrong" decision? No - he just wanted to keep his own unique fashion sense more than he wanted a date. The only thing that concerns me is that Oscar didn't really make this decision consciously, weighing pros and cons, he just "felt" his way through it.
Now, more than a decade later, Oscar is still single but wearing whatever he likes. The thing is, Oscar could have had whatever interests he wanted and gotten a date.
IF he made a mistake, then I think it was assuming that clothes (or a beard) comprised some integral part of his identity. Clothes are bought in stores. A beard grows on your chin just as a wart might grow on your foot.
Change the cloths; shave the beard, and you are still you, but perhaps a more marketable you.
So, if you sense your beard is scaring off the ladies, then either shave it or realize that you chose a beard over companionship. It's not "wrong" to make the choice, so long as you actually make it. Obviously, this applies to more than just facial hair...
I do not smile or laugh without cause, my sense of humor is dark, and my own morals are set in unbreakable stone.
I think there are many people who would find these to be very attractive qualities if given time to adjust. Sometimes it can be a good "ice breaker" to force a laugh or to let someone get to know you before you share the darkest parts of your inner nature/humor. Often, with these sorts of traits, it's not about changing them so much as holding them back and letting someone get to know you a little at a time.
I went out with a girl once. On the
first date she told me every dark secret about herself from a history of abuse and even incest, as if saying, "Are you sure you know what you are getting into with me?"
I wasn't, and there wasn't a second date. It wasn't anything she said that sent me off in search of greener pastures. It was her timing. We weren't "close" enough for her to confide in me like that on date #1. What was date #2 going to be, a proposal? I got out of Dodge.
So, keep your dark sense of humor, but maybe hold off on sharing it for a few dates. Never try to force someone to get to know everything about you all a once. It's overwhelming. I have a natural tendency to do this myself, but it just leads to problems.
It also does not help anything if you make it to 35 before having your first friend(s) and never having been on a date, people just start to assume there is something wrong with you years before then, which does not make any of it less frustrating.
I don't think dating is "easy" for anyone on the spectrum. We often have to make more changes/compromises than do NT's in order to date and have relationships. Alternatively, many don't date/have relationships. Neither approach is "wrong." How much we integrate and conform is a choice. I can tell you that my wife sees 2 versions of me: the public me, and the actual me she sees at home. She loves both, but she got to know the former before the latter.