Sounds like you are definitely getting to know your Equinox. You have been given some great advice so far.
Just for future use, at freshwater beaches you can hunt in any mode. I really like Park 1 most of the time but will use Park 2 also. The manual actually recommends Park 1.
You have some choices at saltwater beaches. I would not pay much attention to the target recommendations for the Beach modes. I would just use whichever mode responded the best to the beach conditions. I've hunted the dry sand in Park 1 and Beach 1. I've hunted the wet sand in Beach 1 too unless it is too noisy (from the salt levels, black sand, etc) and then I switch to Beach 2 especially if you take your Nox into the shallow surf. I have hunted some beaches where Beach 1 was all I needed. Others required Beach 2 if the sand was even slightly damp. When the Nox starts to chatter a lot you either need to switch modes or adjust for EMI which can also happen at crowded beaches.
As far as settings for discrimination it depends on the trash levels and what you want to hunt. Tom said it best, micro gold jewelry hunting at a saltwater beach is fun but it won't pay for your detector as fast as big gold will. Chasing targets that respond with a +1 to +6 and ending up with a tiny piece of foil or other aluminum is not fun after the 20th time. The money is in the targets that come in at +7 to + 22 or so as far as big gold rings, etc. Just realize that you will dig plenty of pull tabs, screw caps and crown bottle caps IF you are being thorough and really going for the gold. You will also dig some nickels and some post 1982 pennies which fall into that range so even if you don't find any gold jewelry you will definitely find some small denomination modern US coins. If you get a good signal from four directions that seems like it is coin sized, dig it if it come in between +7 and +38. If you get a huge signal (circumference wise) that comes in between +10 and 38 it could be an aluminum can or big iron or somebody's cell phone or a toy car............
When I saltwater beach hunt I either use 2 tones of 5 tones again depending on trash levels. That might be a good way for you to start too. You could reject some of those low non-ferrous numbers 0 to +6 or just ignore them.
Some detectors made for the USA tell you what you are about to dig right on the screen which is a joke at least 50% of the time when that is really not what you are about to dig. The Nox (being an internationally used detector) treats you like a world-wide citizen and a grown-up and forces you to learn what the sounds and numbers really mean and which targets overlap.
Good luck on your first saltwater beach hunt.
Jeff