welcome to i boats and the wonderful world of boating
i see you took a safe boating course....is that the one you need for a boating licence?....
if it was just a 20 question course....i highly suggest you search out a power-squadron class room course.
a 23 dancer is a lot of boat for a first time owner but do able.
my best advice would be to stay off the open ocean for a while till you get better at boating. stick to lakes and rivers with a current...this will help you a lot.
read here lots ....this place is not called boat university for nothing.
just a short thing to allways remember.
the captain of the boat is responcible for every life on board the boat.
this means you will have to take control of the people in the boat....set rules....make sure everyone knows what to do in an emergency situation.
i allways have a short safety meeting with new people on board about moving around the boat while underway....the location of all the safety equipment....drinking on board.....ect.
good luck...and have fun