Please help me decide on a career change. Really want (need) to be self employed

[lomplan]

I am about to qualify as a midwife, I will still do bank/agency shifts but I will not be taking a midwife position for a multitude of reasons. I may do a year or so, if I have to.

So I'm very clued up on all thinks maternity/newborns/women's health etc.

I'm relatively intelligent, good with people.

I've thought about aesthetics, but it seems quite saturated?

I want to significantly increase my earning potential, whilst working for myself.

I've considered things like baby massage classes, but the earning potential is pretty low.

Does anyone have any ideas at all please?

Doula

I think you should take a full time position, if only for year. You're just about to graduate so consolidating your learning will be invaluable.
Even if you go self employed with something, a years employment in your chosen degree field will look so much better on your profile.

And yes, aesthetics is saturated with former nurses etc.

I know someone who does private antenatal/hypnobirthing courses with pregnant women. I don't know how much she makes but she seems pretty busy.

Private NCT type classes?
Private breastfeeding /bottle feeding advice?

Recruitment consultant within healthcare?

In my humble opinion, you need to gain a lot of on the job experience to get to the point where you can charge people for your expertise. There's a difference between someone helping you to give birth who has delivered 2000 babies and someone who has delivered 40. It's the cool, calm nature of someone who has seen it all before.So I would say doula, birth consultant is a job for someone with more experience.
Like you said, Botox, fat dissolvers etc is popular but then demand is going up. A parameduc friend of mine left her job to go full time into aesthetics and is doing very well.