Lots of opinions...here's mine
For $2K you can buy cheap boat to learn on so buy a boat, put the white things up, and go. When you want to stop drop those white things...pretty simple. Everything in between can be learned from a book or youtube and some time on the water (light breeze days first).
One note...If you have NO experience on the water at all then a safety course is warranted, you don't want to hurt yourself of others.