How old is old as fuck? Success and charm is part of the equation to expand the possible pool, yes, but why not do anything about that? If you like your job, then you should have some confidence in what you do, that eliminates the need for a big salary, to a certain degree.
Your character should never be set in stone. If you are at that point, then it's time to roll up your sleeves and learn a new skill, pick up a different hobby or do something other than your daily routine. Recently I've started reading books and listening to podcasts about a whole bunch of different things because I was tired of being stuck. You might toss away some ideas and others will excite you and keep you progressing.
If you have the opportunity to go to a gym or get any other form of exercise, please allow yourself to do it. Your mental and physical health are one and united. It's hard to eat real, unprocessed food on a budget, but maybe you can afford a meal each weekend that you take your time to prepare and really enjoy both making and eating?
Friendship is a real important factor to everyone, and I'm sorry you lack close friends. Friendship is more important than courtship. If you can shift focus to finding new, close friends that might open up a new mindset and other options down the road.