At that age mine was very active and cruising about but still contact napping. Didn't start cot naps until around one year old. I did the same and went out as much as possible. He was happiest outdoors.
I recall just co-sleeping for one of the naps on some days if I needed the rest. It got much easier when he dropped to one nap a day as we could go out in the morning and do all the active things, then he'd sleep in his cot at home for 2 hours and I could sleep if I wanted. Then we'd potter at home in the afternoon.
I bought a tuff tray and he used to love playing with different pasta shapes in it. I'd give him cups and tubs and things from the kitchen to put the pasta in and out of.
I also had a basket that I would constantly swap out with interesting things. Some nice sensory toys, but mostly just interesting bits and bobs from around the house. Like a busy board but in a basket. We did build our own busy board too and mounted it on the wall as he loved standing up at it and playing with all the things. You can make your own really easily with safe locks and switches and so on from the hardware shop.
One of his favourite things to do was play with a laundry basket full of fabrics- sheets and towels etc. I also bought play silks for him.
We did a lot of baths at random times if I was really stuck and that always passed a half hour very easily. A bubble bath with pots and pans and spoons from the kitchen is great fun for wee ones.
In terms of toys he was already fascinated with vehicles then and simple push friction vehicles were a hit. You can get nice chunky ones that are easy for little hands. The pull back motion was too hard for him at that age but the friction ones that move with a push were great.
We also did a lot of play dates and those really saved my sanity. Made a lot of friends with babies the same age and we would take it in turns to host coffee mornings. It was bliss because you could all chat and the babies would crawl about occupying themselves.