Hello there! Welcome to planDisney!
How exciting that you're planning a trip to the "Happiest Place on Earth" with your daughter, some of my most special memories are when my kids were that young! When my kids were that age, we usually did 3 days in the theme parks, with a rest day after the first 2 days. We found that a break in between a few long days in the parks was much needed to rest our feet and relax.
There are not age restrictions, but some
attractions do have a specific height requirement. You can
filter the list of attractions by height requirement, and there are plenty of attractions that do not have a height requirement. They also will be clearly displayed at the entrance to each attraction, and a Cast Member can assist if you have any questions.
Since you'll be traveling with your daughter, I highly recommend
traveling with a stroller, or
renting a stroller on-site. You will be doing a ton of walking, and it is always so nice to have a place for little ones to rest their feet or take a nap. We also usually head back to the hotel in the afternoon to take a rest. Even if your daughter doesn't nap, we always feel that a break during the day really helps us recharge!
I hope these tips and recommendations are helpful! If you think of any other questions, please do not hesitate to
follow-up with me directly, I'm here to help!
Have a magical day,
Melissa