Total Beginner: Help!

[buddha]

I went yesterday in San Diego in Mission Bay. I joined the San Diego Windsurfing Association (SDWA). They have a few rental boards available for use and they are the START and the GO. I tried the start with a 3.5 sail. It worked ok but hard to sail upwind at all. The best I could do was about 90 degrees into the wind.

What is the difference in the GO board? I was thinking of taking out the START with the 5.5 sail or just try out the GO board.

What is the normal progression with the beginner boards.

San Diego doesn't have big winds such as San Francisco so maybe that is good for a beginner but bad for a higher intermediate or advance level.

Actually I want to go to Mexico and windsurf when I acquire the skills to do so.

Any help is appreciated.