that sentence didn't make much sense either.
I have played in 2-player games that worked before. But they inevitably fall into one of two categories. 1) a brilliant gm. Not just pretty good, but BRILLIANT. With adventures designed for just one person, which means none of the publically available ones I know of. 2) the game becomes more of a tactical game than a roleplaying game, with the player controlling 2-4 characters. I played this way with my brother for years. It was fun, but what I did wasn't really role playing. That can be ok and fun if you like that sort of thing, just be aware of what it is and what it isn't.
I actually think the D&D Adventure Game is a good gentle introduction to how the game works. However, again, it doesn't teach role playing. It doesn't teach much at all about collaborative storytelling or character interaction. If you design the dungeon well, it can be a problem solving aspect.
What I would recommend, however, is to find a group that meets every other week or so. Any system. Just plop in and play. THere are few games that are entirely inappropriate for newbies, most you can pick up as you go along, and the social nature of the group game will immerse you in taking on a specific role.
You have to recognize, that even with what Gemm says, that you can have a good game with 2 people, it innately requires that at least one of them be very very good and probably quite experienced. It's not recommended for new comers.