How is thread 16 pages? 
It's pretty simple, to look your best 45+ you need to be in the best possible health. So exercise, diet, water, water ,water and sleep are paramount.
Without these basic foundations, it doesn't matter what you do with your hair, or what your skincare is or what you wear - focus on the fundamental health issues first.
Then look at face and body care - moisturise, moisturise, moisturise. The Ordinary is fab for finding which serums suit you. Ensure Vit C and spf in the morning and retinol at night.
Then makeup - the older we get, the less we should wear. Try to just wear mascara, blush and sheer lipstick. Highlighter for extra bloom.
For your hair, your look seems a little boho so grow it, embrace your waves and get honey blonde highlights - think Jen Aniston.
In fact check pinterest out for Ms Aniston style to copy - kind of like thege photos you posted but would just make you look more put together - good tan leather accessories, blazers, linen white shirts, flat front trousers, lived in jeans, midi pencil skirts.
You're still young - have fun 