Spinning with beachcaster?That's hard work.
It really depends how much experience you have.For absolute rookie is safe spot the only way to start.Cove harbour maybe.Waste of time and effort unless you get some clear water though.
I'm a fairly new to it myself and have mostly been fishing peterhead breakwater but it now closed for the foreseeable future due to damage in the last storms. I fished cove a few weeks back and did nothing other than lose lots of tackle. Is cove mainly best for spinning and not bottom fishing? If you do go I'd love to hear how you got on! Maybe it was just my inexperience!
Inverbervie Beach up to the middle of March for Cod water must be coloured in daytime (after an east wind) or fish in the darkness. Big Baits but not too far a cast. Or try Gourdon Pier same as Inverbervie, In the spring i would go down to Dundee and fish the estuary for flounder.