You don't have to do everything on the list right away. These management activities are meant to be used with standard obedience training and corrections for unwanted behaviors. Do what ever you would normally do to teach a dog not to mouth, jump up, pull on the leash, etc. If you incorrectly think your dog is dominant, these activities will not do any harm to your non-dominant dog. The worst that will happen is nothing, while in many cases you will find your dog acting more secure and confident because you have clarified and reinforced its position in the family.
Obedience training is a GOOD idea.
You always eat first. Have a snack or eat your meal before you feed the dog. Make sure the dog sees you eat. Obedience training is a GOOD idea. Do not free feed, put dog on a feeding schedule so it becomes aware that you control the food source.