Soccer players need a lot of different skills, and it does not matter for most of these skills whether you teach Skill A or Skill B first. However, there are some skills that are absolute “must-haves” for any player- and are so important that you probably will want to teach them first.
These are basic ball-holding skills (receiving and shielding); basic ball-stealing skills (defence); and basic take-on skills (attacking). Most kids naturally seem to have a few basic defensive skills, even if they were never formally taught. The other two areas require instruction to accomplish with even minimal competency, so there is a good argument to start first with ball-holding skills; move next to take-on skills; and then to get to ball-stealing skills.