As others have said, you make the best possible five card hand out of your two hole cards, as well as the available five community cards. Most times you use 1-2 of your hole cards to make the best hand, especially if you have a pocket pair, or higher face cards.

I recommend printing out a "Poker Hands Chart" so you can see what hand rankings are- which hands are low and which are high (for example, three 7's are a higher hand than a pair of King's, but a straight is even higher than either).

Poker chips often have different values based on the colour of the chip.

Betting is done each round, before the next community card(s) are drawn.

You can match the current bet, raise the bet, or if no bet is placed yet, you can pass (but still be in the round) by saying check.