Go as indica as you can, stay away from sativas and hybrids.
Find some Northern Lights or some other proper old school bud and see what that does to you.
I’m posting this while she naps in the car seat of my truck. She still isn’t sleeping through the night and refuses the crib but loves a truck ride nap.
My son would only nap in the car too. I racked up so many miles on my car just keeping him asleep haha. Fortunately for me I drove a VW Golf at the time