Hey & welcome back to the guitar.  Thanks to William for the great advice.

I usually start by asking a student:  what is your current skill level & what are your goals.  You've already address those, so thanks!

I think your best use of GT is to start working through the rock courses 1 & 2, then at the same time pick some songs to work on.

https://www.guitartricks.com/course/rock1

https://www.guitartricks.com/songs/rock?sort=popularity

The Rock courses will show you the skills & ideas you'll need to work on in order to play songs.  Jump in at the beginning and use anything you already know as a review.  Eventually you'll find the point at which you are learning new material. 

I encourage you to get starting learning songs you like right away.  If you can't get through the whole song right away, then simplify it to a point at which you can get through it.  It's great practice for learning & memorizing full song forms, then automating the process as much as possible.  If you come across skills in the songs that you don't yet have you'll find out what you need to work on.

The Rock style page is another great place for a deeper dive into skills & ideas that the rock course might only introduce you to.  It's particularly helpful for finding a specific skill at a specific level.

https://www.guitartricks.com/styles/rock 

You mention theory.  It's important to keep your theory (conceptual understanding) & practice (ability to play the ideas) growing at the same pace.  This usually means a little theory goes a long way.  The basic theory is integrated into the context of the lessons in the course.  If at any point you want a deeper dive into the theory of any idea or skill, please ask. You might also eventually be interested in the music theory page.

https://www.guitartricks.com/music-theory

Hope this helps.  Best of success!