Are there any exercises to help learn barre chords?

I’m trying to Learn Guitar. I can play a few simple chords and power chords, but I’m having trouble with Barre chords. My fingers are kinda short and don’t have great reach. is there a way to increase flexibility? Also with barre chords I have a habit of muting notes with my fingers. Any advice on how to stop this would be helpful.

Which is the best guitar strings for me?

for my acoustic Guitar, i already have Ernie ball Strings, changing them soon . would these Ernie ball strings be good? i play mostly chords, its an epiphone guitar.

for my electric guitar, i don’t have strings yet. What should i get? i play some single note songs, and chords. i need one that will last a long time under ten dollars. i have a squire by fender. thanks!