I can walk, but long distances are becoming impossible. Is it worth bringing up a wheelchair? (16F)

Hi everyone,
I’ve been thinking about this for a long time, but I’ve never really known how to bring it up.
I’m ambulatory and can walk around my house and college without too much trouble. I can also just about manage the 10-minute walk to my local shop, although I usually need to stop and sit down for a rest on the way.
I’ve got a complex heart condition. Technically I’m totally mobile I can walk with no issues heck I can even run and jump if I want but I’ve just got so little energy and get so out of breath so incredibly quickly that a wheelchair would more be about conserving as much energy as possible so I can do big days out rather than I literally can’t walk anywhere…
Going into town, days out, theme parks, or anywhere that involves a lot of walking has become incredibly difficult. Technically, I \*can\* do it, but I’m constantly stopping to rest and by the end I’m completely done. Because of that, I’ve started avoiding those kinds of activities altogether.
I’ve been wondering whether using a wheelchair for longer distances would help me actually participate in things again instead of missing out. I know ambulatory wheelchair users exist, although they’re fairly uncommon with my condition(as far as I’m aware), so I feel a bit unsure about even bringing it up.
if I ever did get one, id need an electric one as the energy it would take to push around my own manual chair would kind of defeat the point of saving energy 😅
wouldn’t want to stop walking altogether—I just want something that would let me save my energy for when it matters. At the same time, I know I’d need to try different chairs to see what actually works for me.
Another thing putting me off is the cost. the NHS wouldn’t provide me with anything yet alone an electric chair and I don’t think my parents could afford to buy one privately. That makes me wonder if there’s even any point bringing it up.
Has anyone been in a similar situation? If you’re an ambulatory wheelchair user, how did you know it was the right time to have that conversation, and how did you bring it up with your doctor or family?
I’d really appreciate hearing other people’s experiences.