Open Water Training

I was a competitive swimmer for 13 years, but have not been in the pool much in the last 10 years. Yesterday i watched my boyfriend complete his 2nd marathon and I was inspired to look into an open water swim. I have not done one since I was 8. I was hoping someone could post or forward me a program with workouts that starts in he pool and gradually eases me into the ocean. I have looked at other posts and have not found workouts that have really inspired me. I have about 3 months until the local open water. I am in pretty good shape, but need to ease myself back into the pool. Thanks.