Having decades of experience behind you, even in unrelated fields, can be very helpful when launching into something new. The standard questions of feasibility do apply but only to the known outline of what you are undertaking - the Roman numerals. What about the variables? A, B, C, ...like dirt, sunshine, nutrients, water, temperature, bugs, disease, human fatigue and body pain? Most of the magazine articles on gardening are stories, "I tried this and it didn't work" or "This worked after three years of adjustment". I plan to keep a running list of lessons learned.
LESSON: when planting seeds, don't plant all the seeds of a particular species in case the conditions aren't right and nothing sprouts. You'll then have seeds to start over.
I just received a copy of The New Seed-Starters Handbook by Nancy Bubel (six weeks after attempting to start my first seeds). She begins with this quote from Charles Dudley Warner, "To own a bit of ground, to scratch it with a hoe, to plant seeds and watch the renewal of life -- this is the commonest delight of the race, the most satisfactory thing a man can do." My husband, David, just left for Lowe's to pick up a hoe!