I am a pretty new user..I dont know but I searched in youtube how to trade in poloniex but couldnt find than try to google it couldnt find also.. Everything looks very complicated..Xmr,buy,sell etc... Someone has pictiogram or video for how to use poloniex easily
Cryptocurrency market it is very high risk area of investition, so even for experienced traders it is not easy to earn decent amount.
For you it will be just pure lottery, so if you want invest now doesn't matter what you buy, most likely you will lose, and video from youtube for sure will not help you.
If you dont have experience with trading i suggest you first read a lot about that and after few months try your luck with little amount.