All great advice above!
What works for me when I get 'stuck' on a song or an exercise, is to slow it down - way, way, way, down.
Then It seems I find the places that are an issue. It may be a measure here, or a measure there, that are just stressing my brain and fingers just enough to affect the performance.
If I find any spots like that I isolate them and practice them very slowly, concentrating on the actual mechanics of my fingers and the pick getting where they need to go.
Once I have ruled out trouble spots, gradually increasing the speed of the metronome seems to do the trick. Once I get to a speed where I'm starting to make mistakes or it doesn't feel fluid, I go back to the last one that was great. I never leave it at the mistake. I go back and play a few bpm slower and play it well to solidify that in my brain and muscle memory.
Adding in recording is a whole different challenge! Seems like as soon as the 'record' button is hit things go crazy! But it does let you really hear where some of the challenging spots are, things you really don't hear when you are playing! Its really good to get used to this early on!
Session 4 is a challenging session, so take your time! You are doing very well at only a few weeks in and already up to the faster jam-along tracks!