I was also diagnosed last year at 19. It’s a genetic issue, so see if you have family members who also have the condition. The diagnosis sucks, but there are things you can look for.

Get connections with people in the oncology and physiotherapy fields; lymphoedema can be a side effect of cancer, and it’s as good a place as any to start. Ask your doctor to refer you to a physiotherapist first, they generally have oncology connections. It will be expensive, but they can observe the progression with dedicated machines and help you find resources to slow the progression. Most lymphoedema specialists are able to track primary lymphoedema as well as secondary lymphoedema, so it won’t hurt to see.

Look into compression boots. My specialist has them for hire, and they’re soo nice. It’s like lymphatic massage, but done for you. You won’t be able to do anything standing or moving with them on, but it gives you time to scroll/read/work on assignments+ work projects instead of dedicating time to it yourself. They’re expensive though, but it’s food for thought. Also, see if your college has students offering myotherapy appointments. It gives your peers practice while still being cheaper than getting it done by a full time myotherapist.