Hi Vinny, welcome aboard. Keep an eye one WSF and YBW websites, both have a section for selling boat gear. If you’re on a tight budget have a look for a combined plotter/fishfinder.
Linking’s list is worth following, I’d add a radar reflector, first aid kit, tool kit and also the only thing you are legally obliged to carry – an illustrated set of SOLAS life saving signals. There’s more good advice on the RNLI website and they also offer a free, informal safety check for your boat.
At this time of year, look on the Admiralty charts for rough ground to fish and don't feel the need to head offshore to deep water.
We’re looking forward to reading your catch reports. Enjoy your Seahog, it’s a great boat, not that I’m biased because I started with one.