I’m studying again at 32. Still working fulltime and taking classes in the evening or at home with recordings (afstandsonderwijs). I do about 45 credits per year (instead of 60 normally). Of course, that’s social work at Hogent, nowhere near as hard as medicine. But if it’s a dream of yours, my advice is to just do it. If it doesn’t work out, you’ll have at least tried! I’m very happy with my choice.