As you noticed, there are lots of sources. Actually, all of those can help you understand the basics. If you are not a fan of reading, you can also watch videos. No need to actually give you a specific video link but just hit the search button on Youtube and type "crypto trading basics" or something along those lines.
For your question about "upgrading your trading skills", it will all depend on how far you learn from reading and watching useful resources. You need to actually engage in trading for you to be able to upgrade your trading skills. In reality, there are chances that you need to lose more before becoming a good trader.
P.S whether on article or videos, always ignore the banner or advertisement you will encounter involving deposit money.