Congratulations on your new haircolour - a change is always a good thing! Its nice to meet a new face in the mirror every now and then, and maybe try clothes in new colours. That will also make your family & friend look at you in a new way and not take you for granted. You are brave to make a change!
I am 41 and I change my haircolour every season, not always dramatically, but at least with highligts. My natural haircolour is light brown with some grey, and I like blonde highlights during summertime and rust/coppery for fall. Then maybe a darker brown shade for winter and back to blonde for spring/summer again. I have had from darkest brown, over bright copper to very blonde hair and also tried some carzy colour highlights just for fun. The best thing is the feeling of "new start" with a change of haircolour -and if you dont feel comfortable in it, you can always change to something else.
I say Go for it! and also get some nice scarfs & tops to match your new hairstyle!