U didn’t do a good job at all your back pan is a shingle your cap looks like a snake the top of your dormer is completely wrong u don’t tie a dormer in like that what so ever and your rows are dropping
Like what you did with the white J channel The white corner posts I’ve seen done before like it as well , but the J makes it look fresh . Early 80’s I only used the same color for all of it.
Good Roofer start at the top of the slope, using a scrapping shovel. Get everything, looks clean. NOT A MESS. Clean up bucket, located at the lower end of the roof. Saves time.