It looks like you’re asking for a blog-style or forum post about downloading (version 1.39 — likely the best or most stable classic version).
Euro Truck Simulator 2 (ETS2) version 1.39 is a major legacy update originally released in November 2020, known for its extensive rework of trailers and sound systems . While the current game version has advanced to download euro truck simulator 2 139 best
Euro Truck Simulator 2 1.39 Update Open Beta - SCS Software's blog It looks like you’re asking for a blog-style