I want to join baseball club and occult club.

>> I want to join a baseball and an occult club. 

First, I want to join baseball club because I like baseball.

>> First, I want to join a baseball club because I like baseball. 

I can't participate in real game, but I also like to talk about baseball with people who like baseball.

>> I can’t participate in a real game, but I like to talk about baseball with other people who are also interested in baseball.

I want to join occult club because this is newest club in my school.

>>Next, I want to join an occult club because this is the newest club in my school.

Also it never has club like that before.

>> Also, we never had a club like this before. 

I love watching and experiencing creepy things provided that a lot of people gather with me!

>> I love watching and experiencing scary things with people around me.