I tried to create a second website.
3.Create store view
4.Configuration > Web > Add Store Code to Urls
Set to YES
5.Changed scope to
7.Clear cache, flushed cache, reindex.
But I keep getting 503 Service Unavailable notices. Due to the Add Store Code Url settings the main website is now also under a code https://www.myshop.com/mainwebsite/ there I also get a 503 warning...however..if I go to a category page https://www.myshop.com/mainwebsite/category.html there isn't any problem and the page shows up.