You seek help but you are not open and specific as to what you want the forum to help you out on. At least there's nothing stopping you from mentioning "this gem" you found doing well. With that we could know if you were looking at gems with low price or high. That said, let me quickly remind you that whatever you get here is mere suggestion and not a financial advice.

If you want low price gems, Yobit exchange has lots of them. But the problem with Yobit is that it isn't easy to navigate the platform for noob traders. And if you want a noob friendly exchange, seek Binance. Binance also has a few low price cryptos too. So, the choice is yours to make.