Hi Claudia! Welcome to planDisney!
You are going to LOVE exploring
Star Wars: Galaxy's Edge in Disney's Hollywood Studios! Every time I visit the Planet Batuu, I am blown away by the additional details I see that I hadn't noticed before. There is so much to take in! It sounds like you have done some awesome planning with a reservation for
Savi's Workshop - Handbuilt Lightsabers already in place!
Even though the opening hours for
Disney's Hollywood Studios say 9:00 AM on March 10, 2021, my experience has been that the theme park opens up to one hour earlier than the posted time. This has been to keep crowds outside of the entrance to a minimum. While that has been the case when I have visited, it isn't guaranteed, but with an early reservation for Savi's Workshop, you will be able to enter even if the entrance isn't open to everyone yet.
If you arrive for your reservation and find that the theme park isn't opening early, ask a nearby Cast Member if there is a specific entrance for those with reservation times before park hours. They can let you know where to enter to get to your reservation on time.
I hope you have an ah-maz-ing vacation, Claudia! Please let us know if you have any other questions. May the Force be with you!
Tabitha