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

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

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

Roaring Knight: Crossover (Tentative Title)

[WIP 01]

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

Muffet's cake is ready

Chatting with a vilager

Do i hear 500 followers and 30k likes pog???????!!??!!

Color variants for Frisk. Ya recognize all of them?

The brothers