Help on my baseball (batting)?

Ok. So I'm 14 and going to join a local youth baseball team last time I played baseball I was 12 about to be 13 and I remember I was pretty good. Now because if my age I am forced to play in a u16 league and I wS kind of frightened about how fast 16 year olds can pitch ( witch according to some websites is 70 mph) since when I played I was only 12 the pitches I hit were probably 40-5 mph so I was wondering if anyone knew how I could train myself not only to hit these pitches but to recognize if they are balls or strikes. I wanted to start playing again so I could join my hs team after this summer any help would be greatly appreciated thanks in advanced sebastian.