I'm really sorry, I can only imagine what it must be like to not have the support of your family or friends. I do understand, however, that it can be difficult to keep pursuing something when others bring you down. Those people on the internet who ridicule you don't matter. As a matter of fact, it truly depends on where exactly you post your art online r/learnart and r/drawforme (if you're interested in doing requests for people) tend to be really supportive. All I've seen on those subreddits are really nice people.

The only piece of advice that I can offer you is to prove those people wrong. Keep improving yourself and your art. Persevere and do something with that art. Create whatever you damn well please. Even if you aren't the greatest now, keep practicing and you absolutely will be among them. It will be difficult and it will take time but you'll get there.

Oh and, if possible, get better friends or talk to them about that. I don't know why they would bring you down like that. It sounds like you need more supportive people. I highly suggest posting your art in learnart. I can't recommend any other subreddits since I don't tend to pay that much attention to any others