Hello, Estrella,
How exciting to think you are just a few weeks away from a trip to Walt Disney World! The
strollers that are available to rent at Walt Disney World, in my opinion, are for older children who can sit up more independently. Of course, that can vary by each child so it is more of a judgement call by each family. If you look on the link I provided above, you can see pictures of the stroller to know if it will work for your child. Also within the link, there are 3 private companies that you could rent from that have other options for strollers that you might want to look over.
When you go into a restaurant or attraction, there will be designated stroller parking where you can leave your stroller. I'd make sure to bring any valuables you have with you rather than leaving them in the stroller. If you are unsure where to park your stroller, a cast member will assist you.
I'd also like to suggest doing an internet search for
Stroller Rental Showdown: Walt Disney World Edition
by Angela Dahlgren. This will take you to a comprehensive blog article from last year with many photos that review the various strollers available through Walt Disney World and some different rental companies.
Wishing you a wonderful trip filled with many unforgettable moments! Enjoy Be Our Guest, too! -
Kara