Hi Hataichanok!
It is so wonderful receiving your questions all the way from Bangkok! Welcome to the Disney Parks Moms Panel! You would be surprised how many rides a little one can enjoy at the Walt Disney World Resorts! My daughter's first trip to Walt Disney World was at the age of 17 days old! She was able to ride many attractions with me such as "It's a Small World", Peter Pan's Flight, Dumbo, and many more! You can view a full list of attractions for all guests (regardless of height) by visiting this page:
Attractions. Be sure to pick the option that says "Any Height". Again, the attractions are listed by height not age.
Here are a couple of "must see attractions" my little ones can't live without: "Toy Story Midway Mania" and “Disney Junior – Live on Stage!” at Disney's Hollywood Studios; "Peter Pan's Flight", "Buzz Lightyear's Space Ranger Spin", "It’s a Small World” and the "Magic Carpets of Aladdin" at the Magic Kingdom, "The Seas with Nemo and Friends" at Epcot and "The Boneyard" play area at Disney's Animal Kingdom! Also, you don't want to miss meeting your favorite characters, please visit:
Character Experiences.
I also recommend that you begin your planning by visiting disneyworld.com and signing up for your "My Disney Experience" account. You can also download the My Disney Experience App! You can search for your hotel, dining and even plan your itineraries! Hope this helps!!
If I can offer any more "Visiting Disney with Toddler" tips, please feel free to send them my way!
Wishing you a great vacation!
Yael