So first off before getting into the cosmetics, how is your diet and do you drink enough water?
I'd recommend eating lots of veg as it helps skin glow, and taking a vitamin supplement like Perfectil which is good for hair skin and nails. My flyaways have improved since I started taking it. You will probably get less greys with better diet, I know I do.
Spf 50 every day. Its hard to know where to start with skin, I have always moisturised but last year I went to Greece and I definitely aged my skin...I am 43 so your age is a good time to start prevention as you lose collagen and elasticity in your 40s. I was worried about crows feet and started Elemis Pro Collagen, literally just a drop around each eyes so while it is £35 it lasts forever. I have definitely seen improvement after 6 weeks. You need to try anything for 6 weeks really so it is best only introducing one thing at a time.
I personally would also look at face yoga if you are not keen on botox, lots of you tube vids.
Other people will have better recommendations on skincare.
Essentially though if you do nothing and expose yourself to elements it is ageing, so better to try and protect it going forward.
If you don't like makeup I definitely recommend looking at eyebrow waxing and tinting, it really shapes and uplifts a face. I had my eyelashes lifted which looks like I am permanently wearing mascara and like I curled them, so could be worth considering but not cheap at about £40 every couple of months. Mascara and eyelash curlers cost v little.
You could consider a fringe as a n alternative to botox as a way of hiding crows feet, lots of celebs like Davina Mccall have one. I am gradually introducing one!