I followed most.
Dd had safe cot, bassinet, mattress bedding.
No toys, comforters, pillows but had bumpers to protect her as when she started to become mobile would crawl and roll into the sides all night. I was scared she get a concussion actually
Her basinet was beside our bed until she outgrew it and was rolling over in her sleep at five months and her cot didn't fit into our room
We co sleep. Dh and I don't smoke and she never came in after we had been drinking or on heavy medication but we still used our own blankets and pillows
Dd slept on her tummy from five months when she started rolling this is how she would choose to sleep
When she was very young her day naps were mostly right next to me and I'd allow her to sleep on her tummy occasionally especially if she fell asleep while having tummy time. She was never left alone on her tummy though she was under constant supervision and I'd roll her over after a bit