I adjust it as I go. I don’t have a set play style I can run multiple play styles effectively with the right team. I usually base it off my offensive playmakers for the offensive scheme. For example in my franchise I had Dak running a west coast spread then with the 2th first round pick we got a superstar X factor qb 76 overall field general. So we traded dak for picks and changed the scheme to a vertical zone run in which I work on the defense with the run then go for first downs with the qb. Mixing it up of course, but that’s the general concept.
I changed my defense year three to a 46 style because I got an 85 overall dt in free agency, and my defensive captain is a 95 overall 25 year old. So I adapted the defense to my strength and we became the best defense in the league using the 46 scheme.