how is letting your gf out clubbing being beta?
If you don't let your gf out that means you are beta because your scared she will find someone better then you.
Start meditating - stops social anxiety to an extent.
Do pevlic floor muscle exercises - to last longer in bed.
Find a girlfriend to have be better at sex with.
You don't have to read the 400 pages to understand basic body language. Within 10 pages you will understand the history and bascis.
Read 10 pages of it and if your not impressed dont bother reading...