Newbie friendly open source project?

Hello,

I’m a hobby programmer learning Rails and I love it! I’ve done a few of
my
own RoR projects and now I would like to start participating in open
source
for the first time in my life. I am terrified of doing my first ever
pull
request. Could anyone please recommend an open source project that

  • Has a friendly community
  • Is not too big and intimidating a project (I’m not ready to start
    making
    pull requests to Rails itself for example)

Thank you for reading!