Weight training - when to do it?

I have realised, in order to get quicker, I have to do some weight training. I have been putting it off for long enough. The reason I haven't is quite simple: I hate going to the gym, particularly by myself. I remember back in High School I had a friend who was into weight training and we trained together for a while. That was fun and we used to spur one another on. I just haven't been able to work up the enthusiasm for weght training despite the fact that I bought myself a pair of dumbells and despite the fact that the pool I go to has a gym attached to it. (I have only poked my head in once - the day that I signed up for the gym)! However, enthusiam issues aside, I have now realised, I have to do it; like it or not. My question is: When is the best time to do weight training? I am rather fortunate in that I have about 1 and a half to 2 hours of training time each day. (Usually mid afternoon except on Sat and Sun when I train in the morning). I usually spend an hour and a half in the pool each day. If I were to apportion some of that time to weight training how much should I give over? Should it be at the beginning or the end of a practice? And how many times a week? Sincerely Syd