I am glad to help you I was at the same boat as you, but my boyfriend suggested me to use this virtual hair color changer https://therighthairstyles.com/hair-color-changer/ . It is a really very helpfull app, it helped me to make a right decision
Just decide what tints suit you most - warm or cold.
I would go with natural tints and if you want something extraordinary, then take a look at ginger, red, pink, violet, grey and blue.
If you are looking for a new haircut, I think you can find some nice ideas for you on this website. I like it a lot too, and I have found some cool ones for me there