I’m a similar age to OP and also felt a couple of years ago, like a previous poster, that I’d got a bit stuck in a cbbc presenter vibe. I paid for a colour and style session last year, which was really helpful.
I also love prints and colour, but I’ve found as I’ve got older that I don’t feel like I pull them off as well as I did when I was younger. So generally now I’m sticking to stuff in one colour, or stripes (I love a stripe!). I bring out a bit of playfulness in a belt (I’ve got a great leopard print one, and a gorgeous gold one), earrings (either quite big gold ones from the high street or quirkier coloured ones from Etsy), socks and bright trainers.
I also think the last bits of styling make a difference. I love a shirt tucked into wide leg or barrel jeans, with the sleeves rolled up and a good belt. So I’ve got a great yellow and white striped shirt, which I wear with either my gold belt or a bright blue one. I stick a vest or v neck T shirt under a shirt if it’s a bit chillier and I don’t want to wear a jumper / cardigan.
Having said all of this, I ordered a patterned T shirt from Sugarhill Brighton the other day, which probably is a bit cbbc presenter, but I kept looking at it on the website so I decided just to buy it. It’s a good shape, and I can probably do some nice layering with it. A few years ago I might have bought multiple versions of it in different prints, but now I’m happy to just buy the one.
Anyway, just some ideas / musings!