Well, being all about going fast, this may not be the best forum for that question. But, I'll chime in what I know from my boating as a young adult & then with kids.
Buy something with lots of cockpit & seating room and storage everywhere. Foresake amenities (sinks, built in refrig, etc) for room. All that bling is nice, but room is the one thing you will always want when you start getting the kids & friends into the boat with associated gear. We now have a 26' bowrider, and last w/e with 5 adults and 3 kids it got crowded. You do want a built in cooler, however.
Second - buy something versitile, with plenty of power - in the 20-22 foot range, with 250hp. Foresake top speed for pulling power - 45 mph is plenty fast for a watersports boat. You'll want a I/O IMO, the outboards get in the way.
Although the dedicated watersports boats are nice (Mastercraft, etc), weigh that against the utility of the boat - in rough water, they ride rough. If you expect rough water (from wakes or weather), get a boat with a 21-23 degree vee bottom.
Being your first boat, look at the used market, and don't shy away from some of the lower priced brands to get your feet wet. My first boat was a Bayliner, and it got me a good boating education for little money upfront, and no issues other than maintenance. You'll likely trade in a few years anyway.
Plan for maintenance, it's cheaper than breakdowns. More $ are spent on boats for lack of routine maintenance than anything else IMO.