I'm relatively new to swimming how much should I train and exercise?

I learned how to swim when I was kid but I've been swimming a lot lately and want to get more proficient in it. What is the ideal amount of time I should be working on it? So far I've been going to the pool everyday for about 1.5 hrs. Is that too much? I don't push myself too hard the whole time but I definitely give myself a good run for my money.