Hi there, Claudia! Welcome to planDisney and thanks for your question!
You'll be glad to know that the Disneyland Resort is extremely accommodating to guests of all shapes and sizes! There is not a weight restriction for any
attraction at the parks as long as any safety restraints are able to be fully engaged when riding. I have found that for most attractions, those safety restraints are quite generous and you shouldn't have a problem. There are a few attractions that you might find less comfortable than others, however.
I would suggest maybe skipping
Silly Symphony Swings as the seats are rather narrow. Additionally, I find the lap bar on
Goofy's Sky School to be quite restrictive so you may want to assess that ride vehicle before boarding. Other than those attractions, I would say you shouldn't have much trouble riding the majority of everything else. You might want to watch attraction ride through videos online (just search for individual attractions on YouTube and you'll find lots of options) to get a good idea of what the different ride vehicles look like and how they work. Then you'll be able to create a list of which attractions you feel comfortable riding. But I'm confident that you will find plenty of attractions to enjoy and you will have an amazing time!
-Linda