Congratulations! I hope you enjoy it as much as we do ours.
Speaking as the person in our house responsible for making sure we hit as few docks and other boats as possible, don't get too nervous. Our first trip out was in early spring on a lake with very little activity so I could adjust to the big size difference between our last boat and this one. It was a cold, windy day and definitely worth the trip. Very few people got to watch me make a fool of myself trying to dock our boat.
You didn't ask for advice, but if you had, I would say, "Go Slow" around docks and other tight areas. If you think you are going slow enough, go slower. That big, heavy hull will float a long ways all by itself. The wind will push you around a lot more now than with a 17' boat since it probably didn't have as much freeboard as your 240EX. A lot of boat slips are only 9' wide and our boats at 8'6". That was a frightening realization the first time I thought I would just drive on in to the slip.
That first scratch really hurt when I did it. I still cuss the guy we had just towed in, who sat on the dock watching me come in and get hit with a gust of wind. There was nothing I could do and he just sat and watched me hit without making any move to help me at all. When something like that happens to you and your brand new baby, remember that fiberglass and gel coat can be fixed, but bail money is hard to come by when you punch the ungrateful sob out! 
Kristy
Mark and Kristy
1998 210CCR
Puddle Jumper II