Hi Emay, welcome to planDisney!
I'm so glad you were able to secure
theme park reservations for your desired arrival date! As
Magic Key Holders, you may cross over and switch between theme parks on the same day beginning at 1:00 p.m. So in your current situation, you will need to start your day at
Disneyland Park then beginning at 1:00 p.m. you can hop over to
Disney California Adventure Park. You will not need a reservation to Disney California Adventure Park in order to hop over. Great perk for Magic Key Holders! But please know that the ability to visit the other park will be subject to the park's capacity limitations. Just something to keep in mind.
With all that said, have you heard the amazing news about the return of many beloved experiences? The traditional character meet and greets have returned, which means Mickey and all his Pals are ready to give out the best hugs and sign your autograph books! AND many of the fantastic nighttime experiences are back as well!
The Main Street Electrical Parade,
Disneyland Forever fireworks,
World of Color, and my personal favorite,
Fantasmic! have all returned! I'm excited for you!
See ya real soon!
Jin