Is it fine to do 15 pushups every hour?

I decided to start doing 15 pushups every hour. It's not much per hour, but I feel like it'll build up over the days. Yesterday I totaled to 165. Is this fine for the nervous system or whatever? Like since I'm constantly springing a small workout at my body, will it struggle to switch between high and low adrenaline?

Also, at first it was completely fine, but this morning I was already tired after the first 5. Will I eventually burn out or is 15 not enough for that to happen?

Edit: Alright thanks for the insight I scrapped it lol