How far will you be moving the boat?
Getting everything to work smoothly on a new (to you) boat is usually an iterative process. Take the boat out, see what works and what doesn't, fix what doesn't, and repeat ad infinitum.
It took a year to get mine to the point where everything worked to my satisfaction.
Have you had the sails
up? You can do that in the slip, and check the reefing system on the main while you're at it.
What you can't mess with are the basics : reliable engine, minimum safety equipment
, working (tested) VHF
You might want to top off the battery
electrolyte, and test them. What I do every few months is apply about a 20A load (conveniently what you get with all the lights on) and run the batteries to 50%, measure the Ah I got out of them.