help with hot selling product for newbie

Well if you are looking for a nice to niche to work with, i would suggest to find first of all something that you like, cause you will be spending a lot of time around it, writing about etc. And if you are a total newbie, don't go for the HOT niches, too much competition, you wont be able to handle it.
The best way to find yourself on top with a good reputation is to do things the right way.
You will gain much more useful experience and information if you will have to handle small competition then getting into some "hot" niche and struggling to make some money, then youll start looking for less "white " ways to get yourself on top, because you understand that there is a lot of competition and you dont have the nerves to wait forever and " maybe" get results.
As a newbie you have more chances to make money from the less hot niches.
Take it easy, there is a lot to learn.
think of something useufl, something that people actually need,ask yourself what do you need on a daily bases for example.
And start from there.

Good luck!