Good things:
I loved living alone. I’d never done it before and it scared me shitless before I did it but it was amazing. I created a nest of comfort and calm and chintz 
The latter was a surprise to me as much as anyone but my ex didn’t let me buy things I liked and I went a bit mad with florals and bows which I’ve toned down since. It was a phase and a happy one.
Friends I hadn’t expected to became a huge source of support.
Getting divorced felt a lot more grown up than getting married had. While I desperately wanted a real adult to swoop in and do stressful things for me I just got on with it and felt good about myself for that.
I got to know myself again and did some work on myself which made my next relationship much happier and healthier. I’m remarried to a man I wouldn’t have got the chance to know if I’d stayed with my ex and life is a million times better. But I was happy on my own first and I haven’t made any bad compromises this time because I’m worth being honest about what I need and find it easier to say so now.
I got to ditch some people I’d ended up being friends with through my ex. I’ve said this on here before but there was one couple I was happy to let him have and found out later he’d ditched too. So we agreed on something at the end 
Divorce is obviously an end. Often a painful scary one. You have to let go of the hopes and dreams you had when you got married. You give up the future you grew to assume you’d have. You’ll probably lose some friends, you’ll hopefully gain others. If you haven’t lived on your own it’s daunting but can be brilliant and liberating.
It’s also a beginning. If you’re stuck in an unhappy marriage or find out your spouse isn’t who you thought they were, it’s a chance to start again.