Afternoon nap

I love sleeping. Whoever invented afternoon naps was a genius!
But sleep disruption can be a nightmare. Both insomnia nad and fatigue can be dangerous for to our health. Sometimes, we want to sleep and feel tired but we are not able to fall asleep or we don't get feel rejuvenated after resting.
I start work at 8 am so I get up at 6.30 to get ready and travel to work. After work I'm very tired and usually I usually just eat something and dive under my duvet. I sleep for one to two hours and when I wake up I feel horrible. But after taking a shower I feel like a newborn [we say "feel like a newborn baby" or "feel newborn"].
The problem is that if I rest in the afternoon, I can't sleep before midnight. So I feel great but have to go to sleep late, otherwise I just lie in bed with my energy level up elevated and my mind going on and on crazy. But if I don't have a snooze in the afternoon my energy level remains/stays is low. It sometimes feels like there are two days in one.
I don't know what's better/worse: being tired for half of the day and sleeping well at night, or sleeping during the day and missing that long, deep sleep during night.