How can I make this look like those humen anime fan arts?

Its somewhat ready but im getting this message right now....

Changing core sans...completly...with some help

I drew an roblox avatar i made today, a little witch girl, with magic powers i guess?

Chatting with a vilager

💰Hey all you upcoming creators! Go check out the brand new Robiz Plus campaign maker! ⬇️

The brothers

I may retire soon + anime version of me

I got Sebastian :D

Deep dark lore is near (yes i bought it.... it was taking to long what ya gonna do about it)