its like anything, the more you do it the better you get at it.
how often do i mix…hardly ever! because i have no time to track let alone mix! are my mixes shit as a consequence?..yes!
i forget what i learn mix wise because i leave too much time in between mix sessions. something i need to rectify.
how often do i play guitar…maybe 2 hrs a week max at the moment lol…
am i any good yes, i considder myself pretty good. why? because from the age of 12 - 30 i played it everyday sometimes for up to 8-12 hrs when i was unemployed, free, single and dedicated to music (and getting pissed etc)
so because i have all those hundreds of hours under my belt the guitar is pretty easy for me to fall back into after a 20min or so warm up. having said that, i
m still no where near as good i was a few years ago. and still no good compared to lots of others i know. but its all relative. i can express myself freely on a guitar with good technique and emotion. my technique or ability does not get in the way or limit what i am hearing in my head. i guess its the same with mixing, when you can put the skills of compression, eq, effects, listening etc into practice without thinking or trying ... then you are mixing. otherwise youre learning like the rest of us.
just enjoy it and dont put too much pressure on yourself. this is the best advice i can give.