So is good advise check and seal everything I see on the deck?
Oh, yeah. I tend to think of decks as a sailboat's achilles heel. An outer layer or fiberglass, an inner layer of balsa, and an inner skin of fiberglass. It's a sandwich that's light and strong, but anyplace it has been drilled through for a fitting is a place for water to eventually get in. If the balsa core becomes saturated, the deck is compromised, and it's not a fun repair.
There has been plenty written on the proper way to bed hardware, and the proper way to drill/redrill holes in the deck "sandwich". For many, me included, butyl tape has replaced 3M 4200 and other goops as the go to for bedding hardware. I highly recommend marinehowto.com as an excellent source for information on bedding hardware and dealing with deck penetrations. As you encounter jobs on your new vessel, you would do well to consult the same site for know-how.
If I was the new owner of your boat, I would develop a list of items that need attention soon. Rebedding hardware, one or two pieces at at time would be very high on the list. Also high on the list would be to tend to the standing rigging. The previous owner can tell you if and when it was last replaced. Opinions will vary on how often it should be replaced.
With regard to the decks, if you had the boat surveyed prior to purchase, a careful inspection of the deck with regard to whether there has been water penetration/delamination would have been important. Ditto, if you inspected it yourself. If it hasn't been inspected, at this point, cross your fingers and start inspecting. A Google search will bring up methods you can employ, which will include walking the deck and seeing if you detect any sponginess underfoot and tapping the deck with a screwdriver handle.
Here's a link to an article from West Marine that does a pretty good job on the subject of decks and core saturation.
https://www.westmarine.com/WestAdvisor/Deck-Leaks