Can I upgrade my .net 4.8 webforms webapp to .net 5.0?

I have a medium-sized Web Application project on Framework 4.8. It has Webforms and MVC (and webapi) in it. I am confused by the recent 5.0 announcements that seem to indicate that everything should now be 5.0. After downloading the new SDK, and Visual Studio 16.8 preview4, I am still not able to change the target framework of my main webapp project in its settings. Am I missing a step? Can I upgrade my .net 4.8 app to 5.0?

EF core 3.1 – common table for entity and owned type

I’m trying to implement DDD approach in my project but realized that I have too big aggregates and trying to minimize the amount of data loaded from the database. I have an aggregate Order which during some operations depends on another aggregate- Company. To perform operation RefreshOrderNumber() I need three properties from the Company entity and totally not interested in other fields from the **Company. So, I got an idea to create a value type for Order – OrderCompanyInfo and incapsulate those fields on it