Good for you.
I started uni at 29 (while still a dub and an elder) and found that extra decade a distinct advantage. Because I had a life, and no fear of failure, I had less pressure than a lot of the 18 year olds despite continuing to run my business. Got my MA and now finishing an MSc and have enjoyed most of it.
Can't recall if you're single or not, but I've seen some relationships go through a crucible when one partner's at uni. But it's all character building!