Maybe think about putting off making a comic and work on your writing skills first? I mean if you really don't have good writing skills practice writing first before you jump into something you're not skilled with. If you want to do a comic do short 1-10 page works at your own pace before starting something huge which most people will do at first and then abandon. Keep your scope small.
Also you don't need to tell everyone you have low self esteem, everything will be okay. No one's gonna roast you, we don't know who you are lol