Hey there, Erica!
Welcome to the Disney Parks Moms Panel. Thanks for bringing your great question. While attractions at the Disneyland Resort do not have set weight restrictions, Cast Members must ensure that every Guest can ride safely in each attraction's specific restraint system. When you arrive at the Disneyland Resort, I suggest heading to City Hall in Disneyland Park to discuss your concerns with Guest Services. They can help give you more guidance about specific attractions.
You will be able to enjoy a large number of attractions and all of the fantastic entertainment at the Disneyland Resort. Many of the most popular attractions do not even have restraint systems such as "it's a small world," Pirates of the Caribbean, Jungle Cruise, Disneyland Railroad, and Walt Disney's Enchanted Tiki Room. Some attractions with tighter fitting restraint systems that could be less comfortable are Space Mountain and Big Thunder Mountain Railroad, for example. You may want to avoid the small tunnels inside the Pirate's Lair on Tom Sawyer Island and the stairs and turns of
Tarzan's Treehouse. One of my other favorite tips is to ask the Cast Members at
Finding Nemo Submarine Voyage about the alternate viewing area for this attraction that doesn't require you to enter the narrow submarine stairway.
I hope this helps, and please feel free to return back if you have any other questions. Have a magical day!
-Jennifer