I could have almost written your post. But I'm 5'7" and a 14-16 at the moment (down from a 16-18). I'm 45.
I used to love Fat Face when they were first on the scene (was an early adopter). But now I find their prints a bit twee, and most of their tunic tops have poorly defined waists, are wider at the bottom, with pockets on the hips. All no-nos for the hourglass figure. Also, the tee-shirts are often too short for me. And the necklines not low enough
White Stuff have started doing longer tee-shirts in good colours for me which are great for layering. But like FF I don't much like the patterns/styles/cut and they are very identifiable with lots of ppl wearing them imho.
Now that I've lost a stone (some still to go) I do feel more confident and I've gone from wanting to wear stuff that just covers me up to stuff that I know suits me - highlighting my waist and showing off my curves lol. But I do find it really hard.
I did get some cheap tops in Warehouse yesterday, got very successfully fitted for a couple of bras in John Lewis (what a difference to how you feel and look!!) and then a couple of John Lewis tops.
I so very nearly bought this top but at that price I want to wait until I can get the smaller size. I liked it a lot though. A bit quirky and very flattering.
Colours are hard too. I am best in deep, warm colours and I love primary colours. But a lot of the colours atm seem the wrong shade/hue. For example I love green, but a dark grass green or a British Racing Green. Ones in the stores are more minty. Ditto with shades of yellow.
Anyway OP, I get where you're coming from and I've bookmarked sites from previous posters. Thank you.