[spoonfeeder006]

One thing that might help with the monitoring aspect is the dreem headband at https://dreem.com/

This might give you nightly data on which you can experiment continuously

It measures your sleep via reusable eeg electrodes on a device thats connected to an app

I got it a couple years ago I think for 600 USD. I think now it may be geared towards clinical trials though, at least in the USA, so you may have to contact them about it

There also is (was?) a feature on it where pulses of pink noise were played in sync with deepest NREM brain waves to enhance that aspect sleep... but last I checked you had to purchase it while in the EU or something (i.e. not USA)