Swim Help - strokes/100, breathing

New to tri's and have finished two sprints now. What should I be looking for with respect to swiming. I now have 3 mo of lap swiming experiance. With respect to Sprint distances What is the best breathing tec. I have been taking breaths on every 3 stroke. Also, how many strokes per 100 in a 25 yrd pool should I be striving for. Any other info will be great too.