Hi Rob
A wilson flyer is a very good boat to start with, a very stable platform at rest and quick enough to get about the marks [i had one for many years, that i gutted and refitted]
Best option to view what electronics are available is to try and get along to the Southampton boat show next month, all models will be on view in the tent with the experts on hand to talk you through the options.
Personally My last two boats have used Lowrance equipment, but others are fans of Garmin, Raymarine and other makes.
For safety reasons, a VHF is a must and you are sensible in going for a fixed set.
then a GPS and fishfinder.
There are some good combined units around. I use one on Alfresco.
On the training front, as well as the VHF course, I would recomend starting with an RYA level 2 course, its more hands on for planning boats than a day skippers course.
Have fun
Charlie