I honestly don’t know the answer to your question about what will help your body to ‘get going on the developmental’ track. But I do know that a healthy, well balanced diet with ‘good fats’ and also low in sugar is important.
I’m posting a few sites on hormone balancing foods below so you can see where these fit into your diet. Again, I don’t know if this will help regulate your hormones and get your cycle started…but it won’t hurt to try. That would be something to discuss in the future with your doctor.

Here are a couple of sites for you to read through. Make sure you talk this over with your mom too.
~10 natural ways to balance hormones…
https://www.healthline.com/nutrition/balance-hormones
~48 Foods to naturally balance your hormones
https://www.mindbodygreen.com/articles/hormone-balancing-foods
~ Hormone-Balancing Foods: How Your Diet Can Help Keep Your Hormones Functioning Well
https://www.eatingwell.com/article/7805452/hormone-balancing-foods-how-diet-can-help/
Being a teenager will be of the most difficult times of your life. I’m in my late 60s and I can honestly say, no other era in my life has been as tumultuous with all the stresses of grades, self image, fitting in, worrying about the future… So I empathize with you right now. I always felt inferior in school too! Mostly because I was short. I’d written this in my previous reply to you, but once I got out of school, I realized height didn’t matter one little bit!
There’s a level of insecurity we can have in school when we’re always feeling judged by our peers. Once you’re out of that setting, it gets easier.
I learned too late in life that I had no reason to feel ashamed or insecure. I have every right to be on this planet. No one can make me feel bad about myself…and the same applies to you! That’s something we allow to happen. If we let the opinions of others impact our thoughts, then we end up telling ourselves stories that aren’t true. The more we do that, the worse we feel about ourselves.

I’d like to encourage you to see a different view of yourself. Not as someone who is short but as someone intelligent, athletic, kind, who takes good care of herself, is concerned about getting good grades and being an excellent student.
In reality, there aren’t many actual downsides to being short.
Not being tall won’t impact your job, getting a life mate or much of anything really. (Though I do need a step stool in the kitchen for things on high shelves.)

Clothing used to be an issue when I was young because there were no petite sizes…everything hung on me! Now, there are so many people in the world who are the same height as you (and me) that Petite clothing sizes are the norm! So that should tell you something right there. ☺️

But you may not be done growing yet so stay positive, ok?