Hi, most 3 seaters are a safe bet, as you need the lenght (over 3m) or you cannot get it sea worthy. Speak to your preffered brand dealership, they can guide you.
I like Yamaha, so any VX series or FX will be fine.
Then you need the basic fishing setup on the ski. Such as x4 rod holders and a fishing bag as a starter (and ofcourse the rods, reels, etc).
Launching, can get complicated. Most places if you are not a member you will need your own 4X4 (as they are not happy to lend out the tractors, not even at a price!).
Launch it as close to the water as possible, then you should be able to push it in yourself. With mine I can (VXS, hull seems very light), my brothers VX is a bit heavier, you will struggle with 1 person to push it in.
There's plenty more info but this should do for now