Second, there are some things I could fix. My eyebrows I don't want to fuck with, as I fear they will grow back with a vengeance.
Pulling hairs causes
less regrowth, not more.
I am 6'2" and weigh 210 lbs ... I could change that with diet and exercise and that is what I plan to do when gyms reopen.
Food intake affects weight more than exercise, and doesn't depend on a gym.
In addition, social skills can be learnt. But I've been trying for some time now and the positive results in this area are negligible. (Oh, did I mention that I have been diagnosed with schizophrenia and social anxiety disorder?)
[...]
Fourth, whilst I have a Master of Marketing degree, it is practically useless as I lack the relevant experience employers see as mandatory.
Can I ask why you went into
marketing when you so freely complain about your social skills?
I also believe that women are more perceptive than men and therefore can much easily detect a fake persona.
There are some things you might want to change about your attitude
for real and not as part of a "persona" (Greek: mask)
The most obvious one is that you started a thread saying you can't get a girlfriend because you're "ugly as fuck", but it's not true: you're tall and not that fat. Meanwhile, you also have schizophrenia and no job, which probably do more to prevent you from having a relationship. You want to blame it on your appearance, even though we can now determine that
your appearance is not the problem.
I can't say exactly why that is, but considering the number of tropes in your post that are clearly copied from the "incel" milieu, the most obvious conclusion is that you need to stop visiting incel messageboards and believing their drivel. Stop poisoning your own mind.
Second, regarding "fakeness" in general, it always reminds me of this quote from Alone: "Your treatment isn't for you, it's for other people". If you stop thinking about "improving your social skills" as in giving off a good impression, and
start thinking about the impact you have on people you interact with, you'll probably find your social skills improve on their own.
Finally, you need to swallow your pride and consider an entry-level job or a career change. You weren't born 35 with an MA and no work experience, you walked there. You don't get a job for having a degree, you get a job for demonstrating skills. If you still want to work in marketing, you probably have to start at the bottom of the ladder. If you don't, maybe read the course catalog at your local community college.
Women generally don't want a partner without a job. Men are only interested in that because they think it gives them power and control in the relationship. I can safely guess that you don't want your partner to have that kind of "power and control" over you because, surprise, it's a bad deal and everyone knows it. Working is not an unfair standard.