The training grounds have their own option in the main menu, and give you an intro to the online multiplayer by pitting you against bots with tips that pop up throughout the match. This is a good way to prepare for the online if you are new to the franchise.
The main reason I'm posting this guide is because there were a couple things the other solutions left out that I felt a need to cover. First off, if you die before your bots get ready for a long wait most likely. Typically the bots engage each other in long range lancer warfare and things like that and don't finish each other off, dragging rounds out quite some time.
Also, for your completed tutorial you have to stay until the countdown on the top of the screen reaches ZERO. Do not press pause and exit like the screen prompts you to, otherwise you will not get credit for completing that stage. Other than that, good luck against the bots and this should be an easy 10G.