I'm one of those obsessed with getting chords right. I know exactly which notes belong in every chord. That was fun.
It wasn't until I joined a strum-a-long that I learned how to use them. There is a rhythm in playing with others that confirmed just how proficient I was. (You mean you have to be able to form the chord sequences in time with the music? And sing the correct words too?)
Choose your battle and find shortcuts. Blend in. That takes awareness of what's going on around you. Then you adjust. It may take some time, as the group will be adjusting at the same time as you. Somehow it all falls together. You hear them, maybe they hear you. Winner takes all. At the end of the song, there will be laughter for many reasons
But, it is all genuine laughter. It doesn't get better than that!
I joined another group and things were a bit more cacophonous. Using what had learned I was able to try some "leadership." We all played well enough, but which note to start singing on was missing. I decided to learn to pick out the first few notes to help out. At once, we all could start singing on the same note!
That caused me, for good reason, to learn how to pick the melody line from a written score on staff. Now, the challenge is for me to be able to play the first melody line of every song we do. Some in the group have never heard some of the songs we are learning to play and sing, that is where it helps. It is a great feeling to have them thank my helping them to learn the melody. It is also a great feeling to look at dots on a treble staff and be able to play the notes. Yeah, I fumble around when there is more than one sharp or flat (I'm cool with C, F and G), but they are patient with me.
It's all about having fun and learning to play music.