Jo,
I only started using a pick recently.
I dont finger pluck much, just a little. I am a strummer and I was getting sick of my index finger nail filing down to blood sometimes against the strings.
I find strumming with the thumb is very dull sound.
So I started on the pick strumming. The chords sound clearer and better, my finger nail is a nice shape and no blood or sore finger.
A problem I did have was finding the right plectrum. I found they kept moving about and ended up falling out from my thumb and finger. And sometimes my hand would cramp up trying to hold it tight enough so it didnt move.
Resolved my problems a few ways. You can get plectrums with holes in the middle, this allows you finger and thumb skin to touch making it virtually impossible to slide away.
Also I dont use smooth picks, a pick with some embossed writing on it i.e. dunlop work for me.
Then you got the decision on thick or thin or in between,lol. Buy a few, you will find one to suit you.
Byefurthenoo
KEn
ye get some that are cut out for the job and others just get by from pretending