A very practical aspect of growing came to mind. It is having to move plants. When they are in large wet pots and they have grown, it becomes a challenge. They are heavy and large plants can be damaged. Even watering and dealing with runoff can be difficult or easier based on the setup.
Something like this can help - plant caddy with drainage tray
I have a 3x3x7 gorilla tent. It is perfect for me. I can easily grow 4 photoperiod plants in it. I prune and train them to accomplish this. I have also grown one or two plants it it. The number depends on how you manage the space and plants.
Your thoughts about getting started are very similar to mine. That is Fox Farm Ocean Forest, FF nutrient Trio and autoflowers. Many around here grow autos and are very good at it. There are also many instances where an auto bolts to flower after a couple weeks, is 10" with a few grams of dried flower. Way too much time, energy and $$ to end up with that with much of it being out of your control.
A few final thoughts
You obviously will have to consider your physical ability to maintain what you grow. The demands are much more at the beginning through the first month of flower than after that.
Determine the grow space and access to plants. Thinking a bit in the alternative - you can have one plant in the center of a 4x4. Grow it in a wheeled scrog frame with a powerful high quality light over it. You can grow one larger photoperiod and end up with 12+ ounces once you figure things out.
Lighting is critical. It all fits together. Space, environment, medium, nutrients and lights.
This is larger than I envision but something to consider
One other aspect is pruning and training. Before you germinate any seeds, have a working grasp of Low Stress Training and topping. To grow successfully indoors it is requisite knowledge IMHO.