If you cannot park your new ride inside and out of the weather, put an opaque tarp over it temporarily. You can run a rope from the bow, up over the seats and to the top of the engine. That will give your tarp a "tent" shaped ridge line to help rain water run off. This will protect the boat until you get a suitable cover for it. Way better to store it inside, though.
Congrats on the ride and stay in the channels until you learn the water!