hey guys am new here so how does one upload his krita artwork?

Hello alindichris,

Welcome to Krita community.

There is a forum section for Krita gallery.
viewforum.php?f=138

The section has two subsection WIP and finished artwork.
you can upload your artwork accordingly in any one of them.

There is a discussion about how to share artwork etc, here viewtopic.php?f=276&t=82966

To upload an artwork you have to host it somewhere on the internet ( IMGUR, dropbox, or your own server.) then post the link between [IMG] tags.
The width restriction is 720px , just keep this in mind and resize the artwork before uploading.

P.S. including a licence for the artwork also helps.