Christopher
I made the same way you described.
Watching Charly Porter and following his exercises.
Observing the embouchure of good players
Imitating there sounds etc.

Today I know that every player is different.
Every player looks different

What we can see is only the outside part of the embouchure.
After MtM I know that it is not important how it looks like.
Important is what happened behind the mouthpiece.???
Air, lips and tongue
I can give all of you only one advice.
Be patient and stay with the process!!!!
Good luck
Regards
Hajo🎺