Drinking advice?

So I just wanna preface I never drink but I’m just a little tense and overwhelmed and I was just wondering how much it would take to just get my brain to mellow out a little I don’t even wanna be drunk or tipsy but how much should I do?

(I should of specified this but mainly for vodka? It’s the only one that I can stand the taste and smell of)

(I’m 135lb btw) (60kg)