imo, pick or finger is all up to you lah.
although using finger nail to pick not that practical, since you can't do pinch harmonics and would have difficult tapping with nails.
i think if you practice good enough you'll be able to hold the pick lah.
i mean, when i started electric guitar, i thought i couldn't pick.
cause i've been too used to using my nails for classical guitar.
and on top of that i'm a lefty using a righty guitar.
my right hand is too weak to even hold the pick.
so what i did was, practice scales while picking.
alternate pick, then down pick, then up pick, what ever pattern u can think off lah.
and also while training to pick, you can train ur left hand fingerwork.
will benefit you long time anyway.=D
plus once you know how to pick, you can still use your finger nails anyway.
to play songs that use hybrid picking or smthgn like that. ( not sure though, not exactly a guitarist here)