My husband tries to remind me that technically I bought myself my own "push" present - a nespresso machine. I thought I would enjoy it at the time. I love it! I'm thinking when number 2 starts school/reception, I may buy my push present then.
It depends on you, your relationship, and your husband's ideas. For me, I thought, I wanted something that said, yes, I've done it! I pushed out a baby! So now when I look at the nespresso machine (and also the apple tree we planted shortly after the birth), I will always remember that is what it is for.
#2 was more during lockdown so a different experience. I therefore am choosing to wait until school starts.
If you really want something, buy yourself something.
It kind of reminds of my wedding. All this morning spent on a fleeting day. I then say, okay, that's it, we're buying a really nice camera to take photos of our honeymoon as part of the honeymoon budget (we honeymooned in the UK and drove to our destination - my reasoning was we saved on airfares, let's splurge on the camera...) Now I have a semi-regular reminder of that wonderful day as well.