LogFAQs > #986824862

Not sure about this specific game but in general it's cheaper to buy single cards rather than buy sealed products. It's less fun, but it comes out to being cheaper and you get the stuff you want.

My only experience on TCG collecting is from playing TCG Card Shop simulator, so I presume if I'm going to start collecting, I need to buy sleeves and binders?

These are recommended yea. I typically keep my rare/valuable cards in binders and the rest in storage boxes. Sleeves are almost essential if you play with them.

Are there any particular brands that are known to be of good quality or to avoid?

UltraPro binders and sleeves are probably the most common ones. They're not bad and I use them for my cards. Other brands like Ultimate Guard, Dragonshield, Gamegenic, etc are all decent brands as well. You should probably also get some penny sleeves, they're just cheap sleeves that are good for misc things.

Does one sleeve cards and then put them in the binder? I don't really know how any of that stuff works.

I do this for valuable cards only. A penny sleeve and into the binder is enough.

But once I got my cards, what's kinda the best way to go about maintaining a collection?

In terms of keeping track? I use an app called Collectr to keep track of some of my collections, not sure if it'll include what you have.