very new at this very lost what fun

Welcome MichaelMiguel!
Once you've downloaded and installed jammr (https://jammr.net/download.html), launch the application and it will ask you to choose your sound settings and log in. You'll see a list of jam sessions that you can join.

There is a short video showing how to set up jammr on Windows here:
https://www.youtube.com/watch?v=YHD6jubFLNs

Guides:
Audio setup guide - https://forum.jammr.net/topic/1987/
How to jam successfully - https://forum.jammr.net/topic/1724/
User interface overview - https://forum.jammr.net/topic/1727/

Please let me know if you have any questions!