As others have said on the thread, a natural move is to go from Coinbase to Gdax, both belonging to the same Group, since Gdax gives you a richer control over your buy/sell orders as well as much better Fees. You can transfer from Coinbase to Gdax for free (see Transferring funds between GDAX and Coinbase), and the KYC you did for Coinbase serves you for Gdax.

Regardless, If you really want to learn the principals and concepts, I would read through the free online Forex course at the School of Pipsology . Yes, I know, it’s Forex not specifically crypto, but the core concepts are the same although they playout differently in crypto. Here you’ll learn concepts such as sentiment analysis (bullish, bearish), Charts (line, bar, candlesticks), Support and Resistance, Trend Lines, Stop Loss, Order Entry, and so on. This is the basis for trading.