Here is some of advise and they reli work for me.... I dunno know if u have done that yet or not so i will put tis in spoiler just in case. (SPOILER)during ur trip to ur first blitzball competition, u were once on the ship..... take tidus around and chat wif all the people. Make sure u dont go back down stair or u will be force to sleep. After a while u will encounter the Goers and story goes on..blah blah blah. Then u go to the deck up front and u will be able see a bliztball which will re fresh ur memory about Tidus father. The mini game then starts. U have to complete the task first time to get the skill(Jecht Shot) make sure u save it in case u mass it up. The jecht shot will help a lot in the first few rounds of ur games.

I wouldn't suggest signing up Wakka in ur team b/c u have a better person to choose....Brother. U need some money to hire him.. but u will never regret it. If I were u, put Brother and Tidus up for attack. Brother is very quick so u will need him. But later on u can change him back to defense because he is a defender. try to Hire Rin as a center if u can. these are only my suggestion. I am quite sure u can been the Al bhed team wif brother, he is awesome!!!!!

If u wnt to hire Wedges and Biggs, it is not too much of a big deal but I got my team pretty F**king awesome if this team.

Brother,
Tidus,
Rin,
Jassu,
letty,
Keeper.

mind u, u can find a better keeper for ur team and u have to do it quick. Her name is Miyu...I think u will find her somewhere near moonflow need to port. She is the best keeper in Spira.

hope tis help and good luck and get blitz!!!!!