Why Is My Hair Half Curly Half Straight

Then i saw the tiktok where she treats her hair and it has magically beautiful curls.
Why is my hair half curly half straight. So my question is why is my hair like this. What can i do about it besides straightening the bottom or curling the top. The bottom half of my hair is extremely straight and the top is frizzy. I do not like to spend hours styling my hair every day or use any kind curling flat iron.
The right side of my head with the majority of my hair is super curly but the left side is super not. Possibly it has something to do with asymmetry. Fast forward to quarantine and i cant get a magic straight. I would like to find some options to get the straight portion of my hair to match the natural waves or to straighten the waves to match the straight portion.
To get the perfect longish haircut like below the shoulders ask your stylist to cut the straight hair underneath anywhere from one to three inches depending on how long you want to keep. I would like something permenant. Ot that my mom had straight hair my dad had curly hair so i get both. Is it because the bottom part is damaged or something.
I started my curl journey about a month ago and i haven t used heat since. Its been more than a year since i got one. I have no idea what to do about this. I buy products and guess what.
No two curls are the same and everybody s hair is different. I ve even bleached and dyed the right side several times and it s still way curlier than the left. Most of my products are sulfate silicone and paraben free. If you answer then thank you.
If you want some further reading on this topic of curl change check out my post on why did my hair changed from straight to curly for now i just want you to take away that it s incredibly normal to have mixed curl patterns in your hair. Anyway stuff happens there is probably an explanation. I just want all of my hair to be the same.