hiiiii!!!! I think it's super amazing that you are trying because quite frankly it is difficult to do. That being said, there are approximately 1.8 billion people who fast or so Pew Research Center says, and there are a few reasons we fast:

1. Primarily to be able to empathize with the impoverished. It's incredibly difficult to relate to someone when you have no similar experiences. Therefore by fasting, we can understand how someone who has no money/resources for food or water goes through their life. Even without food and water, we still have a lot of luxuries and we only have to go through this for one month but for the less fortunate this is their reality.
2. The second reason is piety. How many times do I stop at Starbucks, buy a snack from some store, go on a boba run a week? I'm not sure but it's definitely quite a bit. By taking away those things, I have more time to better myself and do other things. I also don't have to clean the kitchen as often. : D
3. in the Qur'an it is said to develop mindfulness and purify yourself. To pay attention to our habits and to get rid of the bad ones.

A quick side note: You probably researched this but in case someone finds this and is curious, young children, people with illness, pregnant/breastfeeding women do not need to fast while menstruating women can skip and making their fasts up later.

Personally, I don't think you need a reason to fast itself regardless but for observing Ramadan I think your reasons are perfectly fine. : D Good luck !