@The Bellcaptain - I feel your pain. This post begins 11-2020 - at this rate looks like nothing gets built for a long long time. Time to start building your layout. Just go ahead with your double loop idea and start building. Get the bench work done, lay the track and run your trains. You might quickly find things you like and others not so much - you can always change your layout. I am on my 5th or 6th iteration and I know this one will change again.
If you don't have it already pick up a copy of Linn Westcott's book "How to build Model Railroad Benchwork" I think you will find it helpful. The construction method makes it easier to change your layout - IMO.
I could add a lot more - but just lay some track and run your trains.