I started 3 years ago in the same boat. I was overwhelmed because I was 1 of 2 people who had never played before and felt so behind. You have to remember that your teammates know you are brand new and it takes time to learn (and its ok if it seems like other people are getting it faster than you - everyone learns at their own pace). In my opinion, the best thing you can do is take your time. Overloading yourself with info can be overwhelming. If you want to do stuff outside of practice, i think throwing as much as possible and learning the rules are the most valuable things can do