I generally top a couple of times (usually twice, but 3 times if a plant is particularly hardy) and then trim only as necessary to maintain good airflow with the plant’s canopy. My plants grow otherwise undisturbed.
Training is another advantage to photos. You have to be careful with training autos since you don’t know when the plant might flower. You control when the plant flowers with photos. I would steer new growers away from autos. Many do fine, but some can be a PITA.
Here’s a link to my most recent journal. I did a bit of a tutorial and lessons learned throughout the grow to help the newer growers.