You also want to check TPLA for dueling, sparring, spinning and most important - guides! They have plenty of material about the lightsaber forms, their application and interpretation in real (martial arts) life and also do's-and-don't's

Just don't start and think you can do it on your own without any information. Always use a guide, be it online or face-to-face!
And get some safety gear - you will need it
