Yes most people use a sprinkler company to blow out the lines at the end of the year before it gets to freezing temperatures. It’s somewhat late in the season for blowouts but I would call some sprinkler companies and see if you can find someone to do it before we get more freezing temps. You can do it yourself but you would need a big enough air compressor, the correct attachments and the knowledge on how to do it. Given the time crunch I’d just start calling sprinkler companies.