There's some stuff called Phenibut (a natural amino acid similar to GABA) and it works wonders.
Kills anxiety and gives you a super confidence/mood boost.
It's available over the counter in the US but only as prescription in some countries.
You can read up up about it online.
It can be slightly habit forming (it's fun) so don't recommend taking it more than a few consecutive days or a week or two at the most.
If you take it for long periods you have to take more and more to get the same effect and when you stop you might have a bit of a grumpy mood and trouble sleeping for a few days.
..it's more for special occasions like job interview where you need to exude confidence or maybe a first date etc. Be careful if you drink though because when you take Phenibut 1 beer feels more like 3 beers and you will get drunk very fast.
I order mine through a company called 'Liftmode' -they have the best prices I've seen (no affiliation with them just google).
If you decide to try it then use it (sparingly) as a tool to discover your own inner confidence and natural abilities.
Then you won't need it to use as a crutch later on as you adapt these qualities to yourself..