I start with seeds that are suited to outdoor growing in my area. If you grow plants that don't flower to mature you won't be happy. My sister grows in an area where she likes patio lights. That limits her choices due to light control. Pineapple og and gelato probably isn't a choice I'd make where I live. For you, the seed choices could be fine.
Next is choosing an area that gets the sun. I plant under a tall spruce with no low branches (20 ft. clear) which gives water from the trees drip line. I expect PH is affected in a positive way since weed plants love it there.
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The type of earth where you dig the hole matters which you obviously get from your post. I've seen plants in clay where I had to pound a spike into the ground before a pole to support the plant could be put in. Don't grow in sand either. You mention putting a tarp or big bag down to separate. That could turn into a moldy bowl but in some climates that wouldn't be a concern. Where I live I dig a hole, plant, and water a dozen times during the grow. No problems with bugs yet either.
Where ever and regardless of what steps you take to prepare an area you then need to be able to grow using the right amount of water and fertilizer, paying attention to when it's too cold or wet. This comes with experience which you get by growing. Where are the dry spots/ wet spots in your yard, the sunny spots, the private spots that are more secure. Start with growing the right strains in a place that could be successful. Then you have to do the right things for months. That will be easier if you set it up properly now.