Acoustic Guitarists: How does one . . . ?/Are there drills online for . . . ?

[Not Heidi]

Either I don't know how to search, or there's nothing out there. It's probably the former, because I highly doubt the latter.

How does one strengthen one's fingers and hands for decent bar chords? Mine are sometimes buzzy, but most often have dead strings. I'm sure the best solution is practice, practice, practice, but I don't want to get to Carnegie Hall. I just want to learn how to play good bar chords. Are there strengthening drills or strengthening tools?

As for finger picking, I know there have to be drills and other instructions.

Can you direct me to some help? Help for these two things that are plaguing my attempt to return to the a-couple-of-levels-above-mediocre-player I was, from my current state of fifth-graders-play-better.

Thanks for your help!

PS You may be wondering, "Why do you need so much help?" "How did you lose your ability?"

Injuries to shoulder and hands; other physical afflictions; a years-long depression that robbed me of my love/need for making music. I haven't played but for sporadic noodling for 22 years but I am determined never to lose it again.