~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1
切る => Give up, stop... N3
Happens next
切る/切れる/切れない => to do something completely to the end/unable to do; too much to finish/complete N3
ふりをする => to pretend; to act as if ~ N3
~にたえる (耐える)    => bear doing ~ N1
ふりをする => To pretend to (be) A N3
Adjectival, Description
ひとつまちがえば => Just (negligence) N3
Ability
てもらえるとありがたい => grateful, thankful if... N4
Emphasize
気味 => -like; -looking; -looked; tending to ~ N2
むりをする => to work too hard, to try too hard, to strain oneself N3
Description
ざるを[得「え」]ない => Only A is left to do/can be done N2
(Not)only, (Not) even
を[踏「ふ」]まえて => Thinking of A N1
Based/focused/depending on