You are self-deprecating yourself and have lack of enthusiasm, which hinder's your motivation and you from chasing your dream. You shouldn't do that. Every newbies need to start somewhere and it's okay if your comic is bad. Because you are LEARNING something from your experience. Be it, story-making, drawing, illustration, etc. it's alright if you suck because you are starting something new. Newbies always suck when they start something, but they continue to improve.
If you draw and do comic as well as doing story making everyday, you will improve. If you look at the other artist in Youtube where they show their old drawing, then you know that "PRACTICE MAKES PERFECT."
My only recommendation for you is you look into Youtube and learn on how to draw, also get a sketchbook for your everyday life of drawing. Don't be discourage if you suck, be aggressive to do it to improve and to chase your dream.
P.S- I want to finish it but is hard to stay motivated, i keep feeling i'm not good enough, that i don't belong here,That i'm horrible , i'm feeling bad about myself and i want to get better, i want to have fun making comics, but i don't know how to do it.
That's totally me few years ago, but I DON'T GIVE UP AND KEEP TRYING. If you don't try, you will never bring out your dream to reality.