It's been 2 years since the last time I played guitar. I tried to play again this morning and something feels off. I felt sore on my wrist when trying to play barre chords for just a few strums. I don't know if it's just my hands not getting used to after 2 years of break.
I remember something about action and measured my guitar's action. And there is quite a gap between the action on its 1st fret and 15th fret. The action on the 1st fret is around 1 - 2 mm and 5-6 mm on the 15th fret. I'm not sure if this is normal or not. For comparison, the action on my electric guitar is pretty much the same across all fret (1-2 mm on the 1st fret and 2-3 mm on the last fret).
Should I adjust the truss rod? I never do this before so I'm worried if I broke my guitar because of it. Here are some pictures of my guitar's action for reference: