Hello I didn't know anything about trading until I first started trading monero on poloniex when it was like $5. Now I've learned a lot just from trading and mining crypto but my only experience is with crypto.

So I guess this is backwards but now I would like to try trading or investing outside of crypto....is that stocks?...see I have no clue what everything is called. Are there trading sites like bittrex etc?

what is the differences between a crypto exchange and a "stock exchange" that trades in dollars? Do you have to provide ID? Are they easier to fund in dollars?

Is there anything like a Trade Satoshi where I can just practice with small amounts?

Thanks for any information