I'm just wondering when did you start to play? Did someone just gave you the account with minato in it? Cause that server is quite old and that account was just a clone account that happened to got minato in rng event.

But first let make it clear, what is your purpose to play? Do you play for fun, chatting with friends, collecting ninjas and don't really mind or don't do pvp at all ? If yes then just follow guides people above me told you so you can have something to do in game everyday. But if your goal is about winning then I'm sorry, hate to break this to you but it's better that you start again in a new server because with your current situation you will NEVER able to win against anyone in ALL pvp content as a F2P except arena where you can abuse OP ninja power without worry about bp. Even if you are active and do everything people above me said, you won't win because that account is beyond saving for a F2P. How can you get free power stuffs from pvp content when you can't win against anyone? You think time, hard work, saving and dedication will fix that? NO, as you move 1 step forward the other dude with 60k already take 5 steps a head.

Just a friendly reminder so you won't waste your time and make the right decision.