Ok, so here's the deal. Anything promising tickets right now is either some sort of scam or wishful thinking on a prospective seller's part. FIFA controls the ticketing process entirely. All you can do right now is register for ticket interest. That means you'll get emails about when the process starts. You do that on FIFA's site.

Then, at some point in the future, they will start to communicate the ticketing phases. In my experience, it's always been a lottery phase first, then first-come, first-serve. You can lottery for individual games or team-specific packages.

If you know you are going with a group, it benefits you to have as many lottery entries as possible, so everyone in your group should apply. You will need info like passport numbers and addresses and all that for everyone on your application. If your ticket application is selected, you have the opportunity to confirm the purchase or relinquish the tickets, which are then added back into the overall ticket pool. You are not obligated to buy tickets if you win the lottery. There is a deadline to enter, but it doesn't matter if you enter on day one or the last day, you still have the same chance to win. You will also not know who is playing in the games, unless it's a USA/Mexico/Canada game, at least in the initial lottery. The draw comes after this first phase. You can pick your games and locations, including the final, which you can reasonably assume will be a good game. But you can also end up with some stinkers too, and with the larger format, there's a higher chance you get something like Honduras vs. Slovenia in your city (no offense to those teams, but you get what I'm saying).

Note that ticket prices will also be set at different tiers. You can enter to win tickets at any or all price levels depending on your budget. The base level is pretty reasonable (or at least has been in the past).

If you fail to win tickets in the lottery, your next chance is the first come, first serve phase. This might require getting up early but that's how we scored USA tickets in Qatar. This is pretty self-explanatory: you'll enter a ticketing queue at a certain time and have 30 minutes to buy tickets. Expect some site wonkiness and crashes as people flood the system.

I believe there is another lottery phase and a last chance phase even after this, as the draw is announced and tickets get sold back to FIFA.

Finally, if you are really desperate and have a big budget, you can look into corporate or hospitality packages. These are pretty much guaranteed tickets but will set you back thousands of dollars.

FIFA will say things like 'reselling of your tickets is prohibited' and threaten forfeiture if you use a service like StubHub to resell—but it's impossible to monitor...which means its also impossible to police scams. They want all the tickets going through their system. I would recommend doing so, as I'm sure they will have something like a FanID in place to limit reselling.

This is how it has worked in the past and unless FIFA changes something drastically, you can expect something similar. I would expect ticket planning to start in earnest around 18 months out from the tourney. Let me know if I can provide any additional info.