Unlike Head-to-Head games it doesn't matter if you play or not on a given day or during a given week, since your participation (or lack of it) doesn't affect the other players in the game.
Play for a week or two, enjoy yourself, see how you do against everyone else, then if you can't play for a while, so be it.
Nothing disrespectful to the other players about that, and I'm sure I speak for everyone else when I say that we'd love to have you in the game, even if you only play sparodically.