Patience...

with my health as i am not a young man anymore and it takes longer to heal. when i want to learn a song i know it will take multiple attempts from metronome work to memorization to walking in picking up the guitar playing a part without charts.
when you walk on stage with new material practiced you now have a new place to practice but the audience calls it a performance. After the umteenth time performing a piece it starts to become something you own which is nice because if you have not played it in a long time it is like riding a bike to relearn! 

Learning an instrument takes much patience and focus over time and repeated attempts.

Give yourself that time.

​You will never regret it.