If I use this (small) oven will I be able to do most of my cooking in my own room?
You're asking a "loaded question" on two different levels. Since no one has thought of what I have to say, I feel compelled to weigh in pointing out some other things besides food preparation.
1) The amount of heat involved, and the electrical draw of so many appliances from a bedroom as opposed to a kitchen, which was designed to safely take so much power compared to a bedroom.
Serious cooking within a bedroom is an inherently bad idea given the combustion load of so many personal possessions normally contained in a bedroom as opposed to a kitchen. Cloth and paper in particular, along with other things. And an elevated possibility of overloading your home's electrical system given the draw of so much electricity from one small room not designed for it. A seriously bad combination of concerns that can potentially lead to an unintended fire.
2) The kind of food you eat that can be prepared under more limited conditions.
That's up to your sense of taste. A microwave oven can be great at cooking a number of things, but IMO meat is most definitely not one of them. Where you have to opt for a "hot plate" (another major fire exposure outside the kitchen) or perhaps as others suggested, an air fryer. But again, both put out an extreme amount of heat not intended for use in a bedroom.
Then throw in a refrigerator on all the time, and a computer and monitor...and anything else beyond cooking appliances. A recipe for disaster in a bedroom, particularly if it's a small one. That you shouldn't be concerned with what hot foods you can prepare in any bedroom, but rather whether you should be doing such a thing at all.
If you intend to proceed regardless of the fire exposure, at the very least you should have cookware that is the most heat resistant, as well as cooking surfaces involving granite, quartzite, and porcelain. Preferably close to 1.5" thick. Materials that are inherently heat-resistant.
But after pointing all this out, my best pitch is simple: "Don't go there". Having a refridgerator in a bedroom alone is probably as far as you should push such an electrical and combustion load in a bedroom. Beyond that, adding high-heat appliances to the equation is just plain "risky business".
Sorry, but as a long-time former insurance underwriter, I can't let this slide. Probably the best thing under such circumstances would be to make that plan on moving out to live under better- and safer circumstances. Where you can cook what you like, when you like
in your own kitchen.