I am slightly younger but not much 43 in April and I have embraced my inner fogey, I didn't feel comfortable with t-shirts with slogans past my early twenties and recently have become comfortable with my tweedier side. I am enjoying it, it is more the making the effort of how I look rather than anything else, I am down to my last pair of jeans and these will be retired when worn out. Personally I am finding it fun dressing up, the detailing and the research. It is about appearance and how one puts oneself over, self expression, thought and consideration, for me it works. Enjoy doing it, it will be fun.
Bingo!
And for the record, no, this isn't embracing your inner fogey, it's just becoming an adult. You've basically nailed it, and the OP would do well to take these words to heart.