I see this kind of like asking BIAB to be a teacher of music theory. I mean, the 4th is the 4th note of a scale in every circumstance, so I never even refer to a chord wheel. It's just not that hard to count D-E-F#-G to get to the 4th in a song written in D.

Remember, when you are writing, it's your song and you can take your song anywhere you want to that sounds right to you. I mean, intro, verse, bridge, chorus, half verse, bridge, chorus, solo, break, chorus... why be boring and cliche if you don't have to? Start with a chorus if you want. One of my songs starts with a bridge in a minor key! Just because I can.

Sit at the keyboard and play every chord in every progression and see what sounds right to you.