It's going to be a steep learning curve, it was for all of us that didn't grow up boating. General advice, go slow, both metaphorically and literally. Build up to bigger trips, start small. No need to hoon around, take it slow until you get a feel for where the sandbanks are in your area as Kevin said. To my mind the most difficult parts of boating are launching and retrieving. Again, when retrieving, take it slow. Far better to have a low speed collision with a wharf than a faster one! Aim to launch at a concrete boat ramp with a wharf to begin with, it makes life so much easier. Avoid the busy times as this will only increase stress. Saturday mornings in summer for example.
Learn how RPM and motor trim influence each other, especially with respect to getting on the plane. Something that I knew nothing about when I got my first boat! Every boat is different, but start with the motor in the lowest position, push up the RPM, once some speed has been obtained and you are on the plane, you can start raising the motor to achieve the most fuel efficient travel. I can't give specific numbers, you'll have to work it out for yourself and your boat.
Motor down, bow down. Motor up, bow up. Once on the plane, bow down gives a more stable ride, but bow up is more fuel efficient to a point. There are exceptions. In a short, sharp, smallish chop, bow up puts you over the top of the waves for a more comfortable ride. More experienced boaties may disagree, these are things I've worked out for myself.
Anchoring is not always as easy at it looks. If you're looking to do overnighters and sleep in the boat, this will require some attention. Make sure you have enough chain and rope and the right size anchor. You need to think about the effect of tide changes on your length of anchor rope and what direction the boat will swing in different winds and currents if close to land or structures above the surface.
Safety gear. VHF, life jackets, PLB, working phone flares etc. Coastguard membership, just do it!
So much to learn which is fun, but also a bit scary at times!