I'm in my 40s and I've got fine lines, bigger lines on my forehead and occasional spots during time if the month. But I do have good skin (freckles aside).
My routine:
Oil cleansing method. You could use plain old olive oil. I use a mix of avocado, sweet almond oil and a teeny bit of castor (when I remember to add it which isn't often.
I have an old pump bottle that I got free from a plastic bottles company when I asked for a free sample, I add the oils, no set ratio as the oils I use can be used at 100% each, and I've used this since my late 30's. I add a dollop of one.a dollop of another, and pop on the lid.
I use cheap flannels from Wilkos, 35p each, massage oil into your face for a minute, rinse the flannel in hot water (hotter than warm but not too hot!) and take off oil. I rinse and take the oil off 3 times(only one application of oil, 3 hot cloth wipe offs, rinsing the flannel after each wipe off) and it's so much better than standard cleanser and waaayyyy cheaper.
I finish with some avocado oil, supposedly good for aging 😀
I've no doubt I look my age. My looks, hair and clothes see to that, but in terms of skin, I am happy. It's about the only aspect of me that I like. I spent lots of money up to then on skincare, but my skin has never looked better, even better than in my 20s. But I'm heading into perimenopause so all that might change 😏