I personally am not experienced in euterpanership and have trouble understanding most of the terminology of it. Because of this, I use Investopedia as a dictionary for financial terms. This website goes very deep on each term. Some terms have so much information about them that their like mini articles. Investopedia has much more value but I only know about the dictionary part of Investopedia. I hope this website is valuable for you :). Investopedia also has a stock market simulator (DISCLAIMER: Investopedia Stock Simulation does NOT use real money)
Here are some useful guides on how to use Investopedia
https://www.youtube.com/watch?v=yA4SGfmL6JA
How to Use the Investopedia Simulator