It sounds like you almost have things up and running on kodi. I can’t tell you how important it is to take your time and setup things properly. Here is a great video posted by another user that goes into detail on how to do many of these tasks.
I can say that once you setup the settings for one or two addons, you will get the hang of things, and the process will become much smoother.
My one suggestion for a new kodi user that uses builds, simply focus on one single addon at a time. Every build has multiple addons and the task of setting each one up can be daunting.