HELP! My Player Mode

Can someone tell me the easiest way to became a starter?

Probably editing your save externally, though you do run the risk of messing things up.

As far as legitimate strategies are concerned, I'd suggesting creating a player that plays to your strengths and suits your style of play. Getting higher teammate grades and having consistent good performances will encourage your coach to give you a shot at starting games, though it depends how deep your team is at your position.

How do I edit my saves?

I'm pretty sure REDitor will take care of it.

Aight.

You have some steps for this?

I don't sorry, but REDitor includes tutorials.

Can't see anything in the REDitor I can only edit roster files, my bad.