For what they are worth, here some of my thoughts.
1. The Zone System was envisioned for single sheet, large format film exposure. You can use it with roll films but you will not get the full benefit.
2. Buy an inexpensive 4x5 large format camera to learn with if you are serious about the zone system.
3. Use one camera, one lens, one film and one handheld meter (spotmeter preferrably) to work with for awhile.
4. Make sure your camera works right. I wasted considerable time at first because my shutter was inconsistent.
5. Learn to develop your own film as soon as possible. It is not that hard.
6. In the meantime call your lab and explain to the manager what you are trying to do. They can make or break your experiments.
7. Take the steps needed to learn the correct exposure index for your film, camera and lens combo.
8. Forget fine art for now. Start learning how to visualize and use your camera to get what you see in your imagination.
9. Buy or make a fake flower arrangement with various color flowers. Your wife can help. It may be the last time you talk for awhile.
10. Using the flower arrangement, try making various types of photos by varying your exposure techniques and your developing methods.
11. Once you can visualize and capture a photograph that is full contrast, low contrast, high key, low key, etc., move to trying various filters, lights, etc. You can even take your flowers outside. (Wear sunscreen though.)
12. When you can visualize a photo or an effect and capture it on film technically then you can move on to printing.
May the Good Lord have mercy on you and your family.
Of course there is still time to drop this entire silly idea and just go out and make snapshots.
EDIT - BTW this is not exactly how I started but I really didn't learn anything useful until I did. I guess I am just a bit denser than the normal photographer.