Do not just list your team. Open your calendar and write what your week actually demanded: training hours, school, deadlines, travel. Turn each into one plain line with a number. You do not need to be captain. Show what you did, not just that you took part.
Sport is a big part of you, not all of you. Build other parts now, while you still compete. Add one small thing outside sport each week and protect it like training. Keep school in the same system. Ask people ahead of you for support. Be kind to yourself.
This is your decision, made with the people who support you. Before you decide, check whether the problem is the sport or the system around it. Look at your whole week, find the exact leak and fix that first. Stepping back is still allowed if it is right for you.
Answers are general information, not professional advice.