Upvote. At least in Australia, it's pretty hard to actually get fired (generalisation, but holds up pretty well). There's no harm in jumping into something, taking a hit with the learning curve and busting ass to get up to speed. If a year down the track you're embedded into the process / team and performing, nobody will give a shit that you spent the first three or five months building up your skill / role.

It's a better model then getting into something you know you're fully capable of and having no incentive to perform like hell. Comfortable but mind destroying.