If you're interested in really getting to know someone with the possibility of building up a (romantic) relationship, I think it's best to not lie about it. Otherwise, someone might start to like a fake version of you and you'll have to own up to it eventually. This just seems like a waste of energy and setting everyone up for disappointment.
Although it's not always necessary to put all your cards on the table when you first meet someone. It's easier said than done, but maybe you can try to frame it in the most positive way. For example, "I'm working on some mental health issues first, but I'd really like to work in x or study y."
Or if that's not your ambition, maybe you could mention something you're interested in or are working on, e.g. "and in the meantime, I'm learning to play the piano / learning Esperanto / reading Ulysses."
I think it's better to focus on finding people that you're compatible with and who like you for who you are (and vice versa). It's not easy though to be honest and show your vulnerabilities and it's something I struggle with as well.