There have been threads on this before that it's worth searching for. In all honesty I don't think it's worth it.
I'm a consultant aged 34 and I couldn't keep going at my current intensity past my mid fifties I think.
OH did medicine as a postgraduate degree then took time out for a PhD. He is 40 now and is 2 years off completing his surgical training. He is exhausted by the night shifts in a way that he wasn't a decade ago when doing FY.
Although you're a "full" doctor at the end of F1 there are very few non training jobs with decent work life balance you could slot into at that stage. Non training post-F1 jobs are generally on F2 style shifts but with none of the protections for bleep free teaching etc. If you wanted to be a GP you'd be looking at a minimum 4 more years (F2 and GPST1-3) or between 6-9 more years to finish as a consultant in a hospital based specialty. GP training is intense- many of the doctors people see in the middle of the night in A&E, admitting them onto acute wards etc, are GPs in training. If you didn't want to be a consultant but wanted to practice fairly independently, there are specialty doctor jobs. But most of these call for at least completion of FY1 and FY2 and a year or so experience in the relevant specialty.
The thing to think about is the shift work and the fact that rostered hours are subject to change and you have almost no say over your location for training contracts. Having family commitments in e.g. one area of the country wouldn't prioritise you for a job there it's all about how well you do in national recruitment.
I was 27 when I moved onto a rota with non-residential on call (rather than shifts you work a regular day then can be phoned any time through the night) and even then it was tiring being woken up and dragging myself in to deal with stuff at 3am then working a normal day afterwards. I'm better at it now I have a toddler!
Most people work a minimum of an hour or so a day beyond their rostered hours and now with remote working all my colleagues (tertiary specialty) are logging in at night to check results, sign off reports etc. We are well paid and most don't mind. But it does mean that what's on paper doesn't match the reality.
There are lots of other related jobs you could train in faster, and be an independent practitioner much earlier. You could look up physician assistant courses to start with.
Something that's also worth saying is that medicine is very hierarchical- there is a team from consultant to registrar to junior doctor. If you would be OK with your boss (and educational supervisor) being possibly 20 years younger than you then that's fine, but I do know people who have struggled with that.