Well, to hit an easy Home Run, follow the corresponding steps:
Rookie: Select Flame Bat and Batting gloves, press R2,R1,R1,L2 for 100000 stat points, upgrade power and contact all the way, and start a game. Then press down the Left analog stick and aim it to the right or left. Then press O while pressing down the analog stick to send it flying. But if it doesn't go over the fence and they start the slo-mo great catch thing, put your palm on the Left analog stick and move all around.
Teammate(s): If they are good power and contact hitters(it will show at the bottom right or left corner of the screen), hold down the Left analog stick and aim it a little left of the center but not all the way left(A.K.A. the gap in right field). Then press O while holding down the analog stick. If it is an average player, use turbo or Big Blast.
Turbo: Press O while holding down the Left analog stick. Aim it Any where.If it doesn't go over the fence, put your palm on the Left analog stick and shake it.
Big Blast: Press X.
Well, hope this was of SOME use to you.