So....
There's really no excuse.
Bobby, get yourself a couple of tomatoe seedlings from your local nursery ( avoid Bunnings) in spring, you'd be surprised how easy they are to grow yourself. Choose baby Roma, or other smaller varieties because they're more resilient to pests and their yield is high.
I promise you, you won't look back.
Tips, they prefer morning sun, don't grow them against anything that radiates heat, like colorbond fence ( they'll fry) dig some compost through the patch and let it sit over winter.
Keep the water up to them.
They're the easiest and most rewarding thing to grow, they'll even grow at the tip, or on top of a compost heap.
They always give more than the effort required for taking care of them, if you are strapped for space, get a couple of grow-bags and grow them in these.
Use good quality organic potting mix.
You'll want grow-bags / planter bags to be at least 19 litres. Deeper the better.
For a kitchen garden for just yourself, 2 to 4 plants will do.
Roma are great, but you may like to experiment with other prolific disease resistant varieties too.
Remember to save your seeds for next year.

I would recommend seedlings from a nursery for your first attempt. Then you can perhaps consider raising your own seedlings next year, or buy some exotic or heirloom varieties not available in nurserys from seed catalogues ( Ie Eden Seeds).
It's a very rewarding hobby, especially if like us you love tomatoes.