I dont know how to import a .jar because the 1.16 profiles dont work but i want 1.16 how do i do it?

Most of what you have been asking is answered in previous forum post, or in stickyed posts.

Wer are unfortunately able to help you due to lack of information. Please read this thread, including the linked instructional pages for linux. Basic skills and interests you'll need to be a MineOS admin