well, getting up will be your first issue (and in my case was the biggest) some people get up right away some it takes awhile...it can also depend on the boat,driver, etc....but I have a feeling if your dad owns a boat dealership he knows boats so you should be ok with all that...basicly 1.relax
2. let the boat do the work and don't stand/turn the board too quickly \
3 (this was my problem, along with part of 2) keep the board in frunt of you in the water as in stay in positition as in you don't necasarly need to lean back but keep your toes up...basicly try to sink the board in the water a little bit before the boat really starts to pull you
once your up just keep your shoulders back look at the boat...hint: invite a hot wake guy to spot you and focus on him...you have to keep your eyes foward
as for falling...it's not that bad just let go of the rope when you knoe you have fallen so it dosn't make things more dramatic...I'm not gonna lie nose planting dose suck but by then you'll already have gotton up and be trully addictied so you wont care after three secounds after
Have fun make sure you always want to ride and arn't pressuring yourself into riding