I know there are loads of longies patterns on Ravelry but I can't tell which are going to be a nightmare and which are easier. All the ones I click on are requiring vast outputs of mathematical reasoning on my part and I can't cope with anything like that at the moment! 

What I want is a nice, simple, 'newborn size' pattern for longies (leggings) where I don't have to work out precise measurements, just follow instructions for a standard size. I'm happy (would prefer it) to work with DPNs and can manage circulars. Yarn type immaterial, as I almost certainly have it! 
DS2 due Boxing Day. I have lost my Knitting Mojo and am desperately trying to regain it and do some nesting at same time. 
TIA