Well done, as others have said and you clearly appreciate this is when you start really learning. You WILL frighten yourself at some point. We all have.
Remember all accidents have more than one cause and so the more you check and the less you leave to chance the safer you will be.
Good luck too on the taildragging, the Cub is a wonderful aeroplane. Also think about joinging the PFA if you haven’t and possibly AOPA, both help keep people flying.
Most importantly HAVE FUN.
Not that far off getting G-EVLE flying now so if you see it (it is VERY red so you can’t miss it) come and say hello.
Melvyn Hiscock