I want to try trading but I don't know what platform to use because there's many out there and I don't know which is which, what do you recommend guys?
There are lots of cryptocurreny trading platforms available out there. the most popular are poloniex, bittrex, gdax, but the best for now i think is binance. but your problem is some of those known trading platforms are currently close for new user because they are upgrading their system so that they can handle huge traffic in their paltform. you can try binance but i dont know if registration is open.
Cryptopia is also a good platform.
Major exchangers right now are really managing their traffic that's why they close the registration temporarily.
Binance closed their registration again. I think, If He wants to trade on major exchanges platform he have to wait for the registration to be open again.