feeling useless

i’m 21 years old. i can’t drive because i have a condition that hasn’t become stable enough for me to be able to operate a car which also prevents me from holding a job. i live with my parents and have no friends. my 19 year old brother is very successful and has his head on straight with everything he does. he has good things in his life and i just feel like we’re complete opposites. he is inspiring, hardworking, extremely talented, and very likable. i love him and wish i was more like him. he gives my parents so much to be proud of and all i give them is medical bills. i have nothing going for me. i feel like i am a burden and it’s really been weighing on me recently.