Stock Trading Order Types

New To Stock Market, got some questions…?
Whats the difference between Day Trading and just trading online with like scott trade or ameritrade?
And what do the different types of trades mean? ie, short order, stop order, margin order, etc… I’ve read deffinitions but I’m still not clear on what exactly some of them are.
Reccomened online trading/day trading site to get started?
I think investopedia.com has some good basic tutorials.
Forex Order Types by Deltastock