My suggestion is to read the requirements well before assigning/requesting anything. Also, if it's a shop you've never done, it's probably smart to only sign up for 1 at first if multiple are available, to get your feet wet and make sure you're up for it. It would be a shame to sign up for multiple assignments and after doing 1 and decide it's not for you and be forced to cancel several and ruin your reputation score.

However, it's been my experience that very few shops on here are overwhelming or ask too much etc. I've been very pleased with the majority of assignments on this platform.