Star Wars: Galaxy's Edge at Hollywood Studios opens to the public on August 29, 2019. While entry to the land will be offered at a first come first serve basis, a few of the experiences within the land will require a reservation.
To experience Oga's Cantina, build your own lightsaber experience, and the build your own droid experience, reservations must be made. Those reservations are now open.
You'll need to secure your reservation with a valid credit card. You will be charged $10 for a no-show at Oga's Cantina, and the full price for a no-show at the Droid building ($99) and lightsaber building ($199) experiences. It does appear if the land is at capacity, having a reservation to one of the experiences will gain you access to the land.
Some users are having trouble booking via the app, use the link below to go to the Disney website to make your reservations.