Hi Jeff, sorry to hear youāre not feeling good about your progress. Guitar is a long journey, and we all hit plateaus. Everyone progresses differently as we all have different backgrounds and strengths/weaknesses. I canāt help with the arthritis thing unfortunately.
Thereās some good advice here already, Iāll point out some things that I think may help you specifically and share some things that help me - which might help you.
From watching what youāve shared, I think you tackle songs that are a bit beyond your playing level. And this impacts your timing, and how good the songs sound.
Compare what I think is your best AVOYP, Shadow of the day- Linkin Park with a newer one, Goodbye Def Leppard. Your Shadow of the Day performance is significantly better than the Def Leppard one. Like, a LOT better. Itās great. Some reasons. IMHO your timing and chord changes make all the difference. You were struggling with a chord change in Goodbye, and you got off time, strumming got out of whack. Break the rhythm, break the song.
Some other advice: just play the guitar, until the guitar is perfect, donāt sing. Itās fun to sing and play. But when youāre learning the songs, just play the guitar parts, and listen to your guitar parts. Let the whole song run in your head, or play along to it with Spotify to get the timing. That will help get the timing and strumming right. Once thatās perfect, add singing in (itās hard mode).
If a song has a new chord, you need to practice a LOT more to get that chord change right, and try to keep the rhythm with it, even if you flub the change. @adi_mrokās advice around sticking to easy chords until youāve nailed those songs rings true.
Something only you know: if youāve skipped modules or grades before properly mastering the material there, it might be worth a refresher. Guitar is very much a practice based activity vs a mental learning based one.
Okay. Some stuff now thatās a bit more generic that I use, which may help you.
I found this page shortly after I started playing, wondering how long it would take me to get good: How Long Does It Take To Learn Guitar? | Hub Guitar. Check out that table on practice - itās possible for someone thatās played for 3 1/2 years to be at the same level as someone whoās played for 10 months, just based on how much they practice. Now obviously those are just example numbers and some people learn faster than others, but the point is - itās all about practice.
I have a rule I set for myself a while ago. Pick up the guitar every day. Tune it, strum some stuff. If I donāt have much time, I might just play a simple song or practice some strumming with a chord progression. More often than not I lead into my practice routine and practice at least an hour. I think it makes a big difference.
I try to mix up learning songs I will be able to play well now (chords I know), with songs that have new techniques in. As well as general technique stuff from Justinās lessons. Thereās something to be said for just learning new material and using the skills youāve got already, rather than trying to play stuff thatās outside your skill level. But I practice both .
Donāt give up Jeff! Youāve just hit a plateau, push through and keep practicing.