The rules and manners people actually ask about: bets and limits, doubling and splitting, insurance, surrender, the dealer's rules, and the rule changes that cost you. Look something up, then get back to playing.
Every table has a sign with its minimum and maximum bet. Bets go out before the cards, and you can change your bet between rounds.
Doubling and splitting are the two ways to put more chips out after you see your cards. Both come with small rules that change from casino to casino.
When the dealer shows an ace, they offer insurance before checking for blackjack. It's a side bet, and a bad one.
Surrender is the opposite: a move that saves chips in a few bad spots. 16 against a 10 loses about $54 per $100 if you play it out; surrender loses exactly $50.
Surrender lets you give up a bad hand and keep half your bet. Not every casino offers it; look for it on the table sign or ask.
The dealer plays by fixed rules, with no choices. The details on the table felt tell you which rules this table uses.
A 6 is a weak card: the dealer busts about 42% of the time. That's why you stand on more hands against it.
Small rule changes add up. This table shows what each one does to the house edge, starting from a good 6-deck game (dealer stands on soft 17, double after split, late surrender, blackjack pays 3 to 2).
At a real table, hand signals matter: the cameras need to see your choice, and words alone may not count.