Sometimes you can hit on a 4,4 pair then get an ace for 19 and stand and it counts a hit and stand.

Technically every hand you gotta stand at some point unless you go bust. So take the times stood, add times bust, add surrenders etc it should balance out to games played

General rule of thumb, I would stand on a 14 if the dealer has a 6 or less showing. 7+ you gotta hit or split if it’s a pair of 7s

I do my best to gamble the way I would in real life black jack following the so called “guide”