My eyesight gotten worse gradually last years now I'm legally blind on right eye at best (visus 0,02=1/50 or less) left eye no light non functional since 15 years due to ROP and retinal detachment. But I successfully completed "normal" school and even studied some time English full-time. But I had to move to other country and stopped it.
I attended for 1,5 years rehabilitation program for people who sight goes worse in a school for blind and low vision. It is financed in Germany to prevent people staying in home due to disability, to learn skills to later get back to work or school. I learned there some useful stuff. If you have access to such kind of rehabilitation it's worth doing. That was for small group age ranged 16-55 years but we got along really well!
I have some tips for you.
If you want to learn and use Braille: start now.
Do not learn Braille by sight! It's common mistake and it's very hard to switch over to proper feeling with your fingers. If you want to learn and then use it effectively learn and read with fingers only it's very important!
First steps actually is to highten your fingers sensitivity, play with Lego, small beads with closed eyes, touch different textures surfaces objects. Train on your clothes first take out random ones and try to recognize them, feel the materials the difference between different jeans, shirts. Touch everything in safe setting. Then start with very large dots can be ping pong balls or pebbels, Legos. Proper hands position is important, sit straight, both hands on the beginning of the line your fingers in one line most important for now are your point fingers other fingers should stay in contact with paper even if they can't read yet. Use your dominant hand for reading, one finger first often point finger ist most sensitive with a practice you could later read simultaneously at the same time with other fingers or even maybe with both hands but it's rare for people who lost sight later in their life. First so with a 1 letter, then alphabet, short words, longer ones. Take your time don't rush don't rub Braille points to feel better. If fingers go numb do a break.
Start now professional mobility training and using white cane to familiarize with it. Use it daily in every condition.
Start learning typing blind on your laptop/computer keyboard I think it's called
$1 it's essential when you can't use mouse anymore. Learn essential keyboard shortcuts to operate computer without mouse. Later if you lose your sight you will need Braille monitor that will show you text from screen in Braille dots for this expensive Screenreader is necessary. Mouse doesn't work well or at all with Screenreader like JAWS/NVDA (only free one)/Supernova/ZoomText Fusion.
You don't have to buy Apple products it's a old myth! Nowadays Windows and Android are as much accessible as iOS and you can save your money for other essential technology aids. I can use myself my 200$ Android phone everyday as well as iPhone (yes I had it before) blindfolded with no problems. I have WearOS - Android accessible 100$ talking smartwatch! There's tons of hardware to choose from not only Samsung or iPhones!
Learn how to safe cut protecting your fingers: always lay item flat, use contrast cutting boards for now.
$1 train that with eyes closed slow at first speed comes later!
The last color I stopped seeing with left eye until it was only light and black was yellow and sometimes orange. Useful for important markings use stickers in those bright neon colors.
Gaming - most accessible from consoles is Xbox. It has Screenreader (it doesn't work in games sadly), has a magnification feature (works everywhere), haptic feedback is awesome so much different vibrations types for what is happening on the screen not only intensity but they're bare so subtile cues if you can try it somewhere! Xbox vibrations feedback works with Windows 10 too and some games I think those with Xbox Anywhere certificate. There's also Colors Schemes, High Contrast, Voice Commands but I think when it's set only to English?
PM me if you have additional questions or if I missed anything or if you're just curious.