Re: upraded my 22' for a 30' and now afraid to leave the slip
Some great practice would be to get out of the marina first, then go out in the middle of the lake and really put it through the ringer with all sorts of maneuvers. You should try stopping from different speeds, try maneuvering at slow speeds, really get the feel for the rudder, prop walk, and what happens when you give it a shot ahead or astern. If you practice all that in the open water you'll have that knowledge built in when it comes time to dock.
Make each moment an occasion to live deeply, happily in peace.
-Thich Nhat Hanh
Thistle #697 (currently in my garage with a hole in it)