I've forgotten how to be a person on my own

[Dumdumbetterrunrun]

One month post breakup with children's dad. I now have a glorious Saturday to myself every week. But I have no idea who I am anymore.
I spent the first few cleaning, then went to dinner with a family member once, had my sick dc home on another day.
But today, nothing. I'm on a bus to the centre of town with no real idea of what I want to do. I thought I'd love this, looking around art galleries, seeing a film on my own, buying a coffee and reading a book.
But I feel lost. Flat. There's a lot of children and families and couples!
I have to remind myself that my life was not like that and we were never that perfect family. I did everything. I spent the day with friends or family, he stayed home and played computer games. But I guess because of being 'default' parent, I didn't have to think about my own needs.
Did anyone else feel the same?

Yes. It's very difficult

Don't be too hard on yourself. You are grieving the life you thought you had. It takes time. Just little steps. Give time time. Sounds like a cliche but a lot of truth in it. Maybe re-engage with a hobby or take up a new one. I promise this will pass and you will grow to love your me time xx

Just try the things you listed. One of them.
Go to a book shop or library and have a browse to see what you like or what you might interested in finding more about.
Choose a coffee or lunch you like.
Sometimes it's just the simple things to start off with.

It is hard - but I promise you won’t feel like this forever.
When my marriage ended, I genuinely couldn’t stand to be in my own company. I spent the whole time either miserable in the silent house on my own, or volunteering for a billion overtime hours at work until I made myself ill.
It’s a massive change in your life. It sounds cheesy, but a good friend of mine who separated from her husband a few years before I did told me that you have to “date yourself” in a way, and learn who you are outside of being a mum and a wife. I really struggled with that at first because I had no sense of identity outside of those roles. It gets easier 🖤

Honestly, as its less raw, you'll begin to really enjoy the time to yourself. Find a yoga class, join a gym, go for a walk and get a coffee, meet up with a friend, have a browse round the shops, get your nails done, watch rubbish on TV. There is so many options with no little people bothering you!
If I have a day to myself I try to do a couple of things so I feel like I've achieved something...everyone else is out today, I went to get my nails done, went to home and bargain, got a coffee and drank it in peace, then went for a little walk around the park as its sunny, then came home and watched something on Netflix. I'm enjoying it@!

Can you maybe join a regular class or something? Book group?

Thank you all for the replies.
The truth is that I work 9-6 Monday to Friday and I don't want to create a plan which is inflexible, so something which I have to commit to in advance.
I'm also trying not to spend too much money!
Today I walked around the second book shops, went in the museum and now I'm in a local bar which is based in a local cinema, writing and drinking a nice local ale. I'm trying to reconnect to what I used to do but still feel torn between the old identity and the new. I used to be an artist so trying to find myself in that world again.
I'm not as enthusiastic and optimistic as the young people who speak with such confidence about their creative pursuits. I am self conscious about my aspirations (hence the ale!) and trying to get back to feeling the pre- kid carefree side is difficult!

It'll take a while to find your groove!

Have a look at MeetUp - there are bound to be some groups that are of interest to you. I found quite a few friends via Meetup and some of the outings were really interesting.

I think you're adjusting to a completely new life and I imagine you're just not used to having time to yourself. I'm sure you'll get used to it and learn to love your day to yourself.