Clean my small apartment

Hi, I'm in a small 2-bedroom unit (renting in a multi-family house that's been split into four units). My guess is that it's around 900 to 1000 square feet and it has hardwood floors. The whole place needs to be cleaned, but I probably want to start by having just one or two rooms cleaned (especially one of the bedrooms that has until recently been very messy and filled with clutter and garbage and litter boxes). The sooner, the better! Thanks.