I would build an Oval and Figure 8 using 4 switches. I have found this to be a very good plan with limited cost and maximum operation fun.
It provides two major operation runs with oval or figure 8, and reversing in either direction.
My brother and I had such a layout up for two weeks at Christmas until 10 or 11 years old and the advent of U control O27 airplanes. I included in in my layouts initial train board stared over 40 years ago. A $10 scratch built turntable can be added by adding one more switch as in my topic
https://ogrforum.ogaugerr.com/...ra-027-layout?page=1 post 9.
See my inner circuit on the pictures below.
Charlie