sure....well heres a quick way to learn.....illl give you an example of a hand and how to count the outs......
YOU: 10s 9s
Them: Ah As
Flop: 8s Js Kh
ok right here is were well count how many "outs" you have
since you have 10 9 you have an "open ended straight draw" meaning two cards(the 7 or Q) could hit to make a straight. since there are four 7s and four Qs in a deck that would be 8 outs meaning 8 cards to make your hand, but thats not all, notice you have a flush draw with tw spades in your hand and 2 spades on the board. There are 4 suits(club,spade,heart,diamond) with 13 numbers(2-10,J,Q,K,A) so since there are 13 spades in the deck and 4 are used you have an additional 9 outs. but remember he has the A of spades so thats one to take away. so in total you have 16 outs which in most cases is a lot too have.
hope this helps i know it is a lot