You definitely can grow nice auto’s outdoor. I recommend a small greenhouse to have more control over your watering/nutrient intake.
The auto’s I grew were very happy and because of this became quite large. The nice thing about auto’s is if you start them early enough you can affectively grow two grows back to back in a season before it gets too cold outside. Mind you that’s dependent on weather in your area.
For sure look at humidity levels if you are using a green house and make sure you have a fan or lots of airflow to prevent bud rot.
If you need pointers I’d be happy to help. Cheers.