I wouldn't sweat things too much as long as you're getting some flying in over the summer. I've gone through two 121 training programs, and for the most part they will teach you everything you need to know, how to fly "their way" and close to everyone in both classes passed...the ones that didn't really didnt put in the study effort or we're doing their own thing during ground school.

That being said, my advice would be to grab a few hours in a glass cockpit if you're lacking in that kind of experience-focus on approaches and go to busier airports to practice comms . I'd only invest in a few flights until you feel comfortable training your eyes on glass displays...

If you have a computer you could also practice some approaches on FSX if you can still find a copy (old program) only focusing on glass displays/shooting approaches...might give you a tiny boost.

Lastly, if you're really motivated, pick up some books and start learning the basic jet systems and going over IFR material..just don't beat yourself up too much. Good luck!