[Fletch]

Annie… Quit the practice before it starts hurting… (But don’t fret, you muscles will adapt/grow in time and you’ll be able to play longer…)

FWIW, I often practice my fretting and strumming separately… So practice your chord changes with a simple down strokes so you can just focus on your fretting. And Vica Versa, just hold one chord whilst learning a new Stumming/picking pattern. Then, when your comfortable with the separates, start doing them together… Might save bobby your head around…

Have fun… Break your practice time up if you need to… 🙂