Has the problems with WP 3.0 been worked out in the new version.

I am sorry if this has been addressed. Really, I am. I am total newbie who is trying to help a local charity out by redoing their Web site for free, using WP in my spare time. I took about a month off and forgot much of what I learned in the prior month. The goal is to have this site up and workign within a month. So I want to know if I should go up from 3.5.1 to 3.5.3 and at the same time, consider upgrading to WP 3.0.

I don't want to be a computer programmer. I want to do whatever is easier to get the best and more stable result while still having something that looks kinda cool. That is the beauty of WP. Even idiots like me think they can do something. Or is that the curse?

Andy