If you're taking lessons, see if your teacher can put you in touch with some folks. Maybe contact a guitar or drum teacher and ask them.
If you go to church, contact the music director and see if they're interested. Even if you aren't performing at a service, they may be able to put you in touch with someone.
Check local music stores and see if they have a bulletin board, etc.
Talk someone else in the family (or gf/bf) into learning drums or guitar

.