BGP/OSPF own lab setup questions.

Hi,

I am quite new to BGP, I want to setup a lab which has 3AS groups with full connectivity.

https://imgur.com/hJG5HeF - different colours = different subnets with 3 AS groups: bottom left, middle and bottom right.

I was wondering is it easier to run OSPF and BGP ontop of this? In terms of the setup I assume set multiple area ospf/gain full connectivity and add BGP ontop?

Sorry if this is the wrong subreddit, and please let me know if you don't understand my questions I will try and make it clearer.

Thanks again.