Hi Ahova84 and welcome to SaleHoo.
Best place to start is to let us know what type of products you are interested in selling. It's also helpful if you indicate the markets you would like to sell through and your preference of supply resource, be it wholesale, drop ship or whatever else.
You can check out the education section by selecting the education tab at the top of the page, and also read through the forum when you get some spare time, stacks of good information included there covering a wide variety of topics.
Cheers