Hi Rob,
Congrats on your first post, thats the hard bit out the way.
Im sure someone will be along shortly to give you advice but will probably want an idea of your budget.
There is a chartplotter on offer in the swapshop section currently which might be worth a look.
I suggest that a vhf is priority followed by a depth/fish finder of sorts
good luck and keep the queries coming
cheers
PJ