congratulations,
Nearly 30 years ago a friend loaned me a board boat, ie one you sit on as opposed to in, he gave me 3 big books and told me to make sure I read and understood everything before getting the boat wet, I studied and read and mostly got really confused , it occured to me that if I had tried to learn to ride a bicycle by reading a book I would have still been reading, so I put the boat in the water, giving no thought to wind conditions, took off like a shot, and almost turned it when the one thing I had read came back to me, when in doubt let it out, I tell this to everyone I talk to that is new to sailing to me it is the most single important thing to remember, good luck have fun , 50 doesnt hurt a bit, Mike Bacome