ok at my school we have a guitar club once a week where people that can play, play and whenever i play there( i usually play rhythm) i use a pick but when i come home to practice i use the side of my thumb to stum since i can't play as good with a pick so should i just start training myself to use the pick all the time?
do whatever feels natural, although the more you practice with a pick, the better you will become with it
do you HAVE to play with pick in school? if not - then play however you feel comfortable. if you HAVE to play with pick(which would be absolutely ridicilus) then - practice at your home