I am a beginner (learning with acoustic guitar). Started learning major chords now and this is the sequence I am planning on practicing it; A, A-A#, A-B.... A#, A#-A, A#-B.... i.e I also want to practice *changing* the chords right now. I already am having finger pain, but now when I play chords it is even more.

When I change the chords *without* removing the contact between the fingers and the strings, The pain gets unbearable but when I do *take my fingers off the strings* between changing chords the pain is less but I do more mistakes and it takes longer for me to relocate the fingers.

In which method should I keep practicing? and what is the ideal chord-practicing time for beginner. I tried 1 hr one day and I couldn't lift my hand the next.