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

The brothers

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

Memes

Chatting with a vilager

Sibling dance am I right

First house completed + 1 build

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

Idk if counts as fanart or not lol, have an Padoru Sans pfp :p (credits 4 the author of padoru sans on tumblr)

Ns si cuenta como fanart o no lol, tomen un pfp de Sans Padoru (créditos al autorx de sans padoru en tumblr)

wise