Tiina,
Since 2008 a lot of things have changed. Unless you know what firm you are interested in and you know they use AutoCAD you may want to check other options out. Several firms that I know of are using SketchUp extensively, even to the point of using the layout feature and preparing construction documents using this program. Others are using other design software and are even branching out into BIM/SIM (Building Information Modeling or Site Information Modeling) in the form of Revit from Autodesk or Landmark from Vectorworks.
Either way I would suggest you download a trial version and just jump right back in. While it has been seven 9 years not much has changed, and if you were a extensive user you will see it will come back to you. I’ve switched to Vectorworks Landmark six years ago and to this day if I have to go back to AutoCAD it comes back, all be it a little rusty.
Best of luck on the job search and welcome back to the profession!
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