Hi there, Jesus!
Thanks so much for visiting the Disney Parks Moms Panel with your question. It sounds like you have created many magical memories at the Disneyland Resort with your family, and I'm excited for all the new ones you will make together on your next visit.
Star Wars: Galaxy's Edge is one of the most exciting enhancements the Disneyland Resort has seen in its history. As you mentioned, all Guests wishing to gain entry into this land from now until June 23, 2019 will need a no-cost reservation. All online reservations to Star Wars: Galaxy's Edge unfortunately filled up the day they became available on May 2, 2019. Currently the only way to guarantee a reservation slot to visit this land through June 23, 2019 is to make a
Disneyland Resort Hotel reservation. Many dates are still available! Hopefully this will work for your family so your son can explore the planet of Batuu. Don't forget about all the other great Star Wars experiences at the Disneyland Resort like Star Tours - The Adventures Continue, Star Wars Launch Bay, and the amazing virtual reality experience
The VOID in the Downtown Disney District.
Since your son is
celebrating a birthday, don't forget to stop by City Hall in Disneyland Park for a complimentary birthday button. I love the greetings I get from fellow Guests, Cast Members, and Characters when I have celebrated a birthday in the parks.
I hope this helps, and May the Force be With You!
-Jennifer