Strange section of the forum to post this Ribald, but i spotted it...
I ski from my RIB, as do friends. I'm no expert but at least i have some experience!
I normaly run a 24" stainless prop for cruising, which i can ski from fine, but beginers struggle so i bought a much smaller one - 19" - which gives loads moe pull-up and make learning much easier, so yes more torque is good, but i don't have much of a feel for the range of the 60 you have got - best try it and see really.
The British Water Ski Association (BWSA) have courses in a similar way way to the RYA, but i know nothing more - have thought about getting some sort of course / certificate for myself, so if you fancy it contact me....
Get a book, or a video, that's how i learnt. 'JOBE' (a ski manufacturer) make a good video, i borrowed it from the local chandlers! It's all common sense, safety, slow take-up on the line, agree hand signals before-hand, must be at least two people in boat (this is usualy an insurance clause if you have Ski cover).
Er, one final point - are the ski's a beginners set? If not don't even bother - spnd the £100- £150 and buy a proper beginners set, soooo much easier to get up with a beginners pair of skis!
Feel free to pick my brain if you need more info