1- first rule of trading is investing in a skin (what i did was investing in a 65$ knife)
2- downloads steam helper on google so you can see all the prices of the items quickly and see what people offer you and how much $ they offer you
3- start sending trade offers this one may take a while if you want to make profit
4 enjoy the profit you will get
it took me a long time but i went from a rust coat bowie knife to an m9 bayonet so dont give up :)