No worries, friend. Everyone starts like that. Even I. But your drawing is pretty cool, the shading and the gradient background, and the facial expressions are good. To be honest, I am bad at drawing on tablets.
I suggest drawing on PC, which is better. And search some sites of manga drawing; I did as well and I could make cool things on paper sheets.
Continue doing what you do the best,
No matter who said the worst
Life is such a rigid test
and... Crap, I am bad at rhymes