Suze, it's not that complicated really.
You need to know the odds for common situations like flush and str8 draws. Learn the odds for when there are 2 cards to come then if you need the odds for just one card simply half it.
Knowing the odds is very different from being able to use them properly. In NL they are usually only purely applicable if you or your opponent is all-in before the river. Otherwise your in the more speculative arena of 'implied odds'. Implied odds take into account money you could win if you hit your hand, but which is not yet in pot. Working out implied odds is not an exact science.
If you try to radically alter your style to become more profitable quickly then you will lose. It is far better to let your game evolve slowly. Continue to play in the games that your making in and move up the levels slowly, when you are sufficiently bankrolled. There is nothing wrong with experimenting with other games every so often, but you should know where you're making your money and stick to that as your default.
Here's a simple odds chart.
http://www.texasholdem-poker.com/odds_chart.php?chance_format=percentage&decimals=2&Display=DisplayGood luck.