Can I Learn Sailing Theory Virtually ?

[Curmudgeon]

I'm too old to remember how I learned to sail. It wasn't from a book. Get the dinghy, preferably something like a laser. Go sailing. Wear a life jacket.

[Don1500]

just go, you'll learn. Just be conservative for a while, sail with your first reef in at 10 knts. or no mainsail. Stay close to protected water. Watch the weather and mind the sea. Know where you are at all times.

[webejammin]

One thing you can do setting at home is to study the Coast Guard's Rules Of the Road ( learn how to navigate with other boats and ships )
As a guy that grew up sailing catamarans ( Hobie cat 16 ) , the feeling is different with only about 5 deg heal instead of 35 deg heal on a monohull, I've had both. Sailing is about feeling the breeze and gusts and learning to feather and not fly a hull, you get better speeds. There's probably some good instructional vidios to watch especially on a boat like you will be sailing on.