Mask off the area your drilling, don't forget to bevel the edges of the holes. Double check everything, dimensions, size of bit, whats behind what your drilling into.
I always think of the boat as a basic package the things you add only improve it(hopefully). Its always easier to drill a hole if your improving something(its one of those glass is half full kind of things)
Start with the simple things first, and graduate to the tougher task as your skill and confidence improves.
Git-R-Done :thup