How to choose the right sedatives?

First of all you should go and see your doctor. And this question is weird because it really depends on the country you are in. Some of drugs are illegal in Europe but they are totally fine in the UK

I would advise you to try to manage without pills. And don't take any medication at all without a doctor's prescription. You could try starting with a massage or some herbal tea, going to bed earlier, and not using the phone before going to bed.

It is better, of course, to avoid stress, lead a healthy lifestyle and stick to a balanced diet. But it doesn't always work out. It all depends on the severity of your condition. I took oxazepam, for example. You can read more about it at https://medicalbrandnames.com/antianxiety-medications/oxazepam.html. You can try to talk to a doctor about it. In any case, it is up to you.