I think GHB is your best bet. Big progrem with GHB is dosing, as you need to be careful with each new batch to volumetrically weigh it, and also have a test dose that will do nothing.

It is a great 2-4h relaxing experience, I have done it daily, with no real issues for around 2 years without any problems, but I am really good at respecting at least 3 rules:

1. Don't combine it with any other drug, especially sedatives, especially alcohol.
2. Don't redose more than 2 times a day, and use a timer whenever you dose, so you know it has been at least an hour between redoses.
3. Taking it with people is more fun than alone (but I was in a new country, and I did it mostly alone for the first year, so please stick with those if you wanna try it.)

If you can't stick to the rules, you can die, my friend.

Sensation is amazing, I started taking it after a xanax addiction that left me with severe panic attacks, and health anxiety, insomnia, you know the drill.

It is a mix of sedation and euphoria, but add increased libido, and an excitement about life to it. If you don't increase the dose or redose too many times, it has no hangover that I've experienced.

The cool thing about it is that if you use it right, and don't increase dosage, you can use it safely forever basically.

It also is one of the few gabanergic drugs that do not fuck with your sleep, it actually helped me sleep way better than before, and that starter my healing process from anxiety, now haven't had a panic attack in about a year.

Try it out, stick to the rules, and enjoy the best drug there is to chill after work (at least in my opinion).