Very early in the solo flights, you want to learn EVERYTHING.
In my days (LONG time ago) the first things I learned during those boring nav flights was the use of VOR and ADF. (there was no GPS back then at all)
Once VOR and ADF where mastered, and I was pretty confident using them, the problem of "getting lost" was over.
On every military NAV map you can find the minimum safe height for each sector.
So flying into things was no problem either.
Next came the basic Instrument flights, and when it came time to do the PPL, I passed.
2 weeks later I bought my Jodel.
A month later I was touring in the South of France. PS; I am from North Belgium.
THE trick is simple : Even when solo in the early hrs, don't fly to fly.
Set yourself a goal. LEARN each and every flight.
Do your homework, study. (I had to do it in books as there was no Internet back then either).
Study with a goal => Talk to your instructor, and go out to fly to learn.
Above all, have fun doing it.