There are several free courses on the internet:

https://www.coursera.org/learn/cryptocurrency - an 11-week online course by Princeton. I haven't tried this myself yet, but I've heard great things about it. You'll probably learn everything you need to know about Bitcoin and its underlying technology if you finish this.

https://www.edx.org/course/industry-4-0-how-revolutionize-business-hkpolyux-i4-0x - discusses how Bitcoin and other emerging technologies can help you revolutionize your business. If you want to learn how to earn with Bitcoin, this might be beneficial to you.

I'm sure there are others, but those would be excellent places to start if you want to learn. Try not to get into crypto investment classes as a large majority of those are scams. You're much better of gaining knowledge on your own and applying it to your portfolio.