To Penny S. Hitting a wall is fairly normal in my experience. I have 3 students, 2 teenaged girls and myself. The girls are beginners and I've been learning off and on for 50-some years. We all hit walls. When I hit one, it's usually because I've been concentrating on one piece of music for too long and I've learned mistakes that I'll keep making if I keep playing the same piece. If I walk away from that one and go play something else until I've forgotten enough of the mistakes, I find that when I go back to it, I can make progress. I don't find music to be easy. I can read the dots but I have to have my reading glasses on and sit so close that the guitar hits the music stand and I can't play while reading the dots. I have to memorize the dots, figure out how to play them train myself to play them without thinking too much and then I can start trying to make music out of them. IMHO, the theme is in the dots but the music isn't. I can also play by ear to some degree but it's still a matter of finding the theme, figuring out the chords and melody and then trying to make music out of it.

Anyway, IMHO, if you hit a wall, go play something else for awhile, try a different song or a different instrument. Come back and start again and the wall may have moved further into the piece. That's what I have my teenaged students do, move on to something new and then come back to where the wall was. Good luck.