Is there any beginner courses I can take that will teach me all about investing and their lingo?

I want to invest, hell I HAVE to invest, but I feel like I'm jumping into the deep end here.

I have an IBKR account but only just discovered that I can't trade in my local currency (I have to use USD)
AND there's a bunch of stuff like Sell Order, Buy Order, Minimum Sell, Ratios, etc. that I'm kinda lost on...