Crypto is an extremely volatile asset. That’s why I would recommend you to pick the exchange with a stop loss feature. It will help you to reduce the risk of losses and automatically sell your coins if the price drops lower than you indicated in a stop loss. Successful crypto trading is hard work that requires everyday practice. If you think that you are not ready to start real trading, you can practice on a free demo account, offered by Cex Broker (https://cexbro.com/). It provides all the necessary trading tools including the stop-loss feature. Furthermore, signing up now you get as low trading fees as 0,05% for 2 months. I think it is hard if not impossible to find lower fees.