As a pretty much ungroomed 50+ yo

[RestEasy]

If I were to make 2022 a year of transformation what should the priorities be?

I'm tall and slim, natural light blonde hair, decent haircut (I think) every 6 weeks.

That's about it. I pluck the bristles on my top lip and keep my eyebrows tidy. Nails are clean and short. Clothes are good quality and well cared for. I did have my colours done about a decade ago and that has been really worthwhile because everything in my wardrobe works together.

I could spend "some" money and "some" time on myself but I'm never going to be someone who spends hours at the salon every week. An acquaintance was telling me yesterday about her eyelashes and how she goes for 45 mins of infills every two weeks on top of regular nail, waxing, tanning and facial appointments. I'm not that person.

I'm not talking about procedures either. The straightforward things that can make you look more "done", but still natural , without becoming a way of life.

I’d also say exercise, since you seem to have the basics covered. I have started Pilates and it’s amazing how quickly it makes you aware of posture and how quickly your muscles get stronger.
Getting eyebrows professionally threaded is a good idea because a good shape can really lift the face. You can dye them at home as good as a salon with dybrow.
Nails, I also agree with. Neat and cared for do make a person look more groomed. And women do notice. As does a long wool coat.