You have posted this on the wrong forum. This is a technical forum and not a gardening or environmental forum. This forum deals with helping people fix there electronics to help with picking out pc parts and many other technical things.
I've been thinking about starting a garden for a long time to grow some vegetables and herbs, also a buddy of mine said he grows sunflowers then harvests the seeds, salts them and eats them... and sunflower seeds are probably my favorite thing on the planet
However, please be aware: squirrels love sunflower seeds also.....
Does not take much to grow herbs - just a few pots and a sunny place to put them. And water as necessary.
The growing part is generally easy. Protecting the garden is often problematic. Not at all uncommon to get up one morning and find all munched away.
Do not know where you live of course but many areas have groups comprised of local Master Gardeners. They are well trained and very knowledgeable.
They tend to set up shop here and there (e.g., local libraries) to provide free information, advice, and recommendations. You can take in weeds, insects, problem plants and get help with yard and garden problems. Any local agricultural agencies may be able to help as well - soil testing perhaps.
But first, just get your hands dirty and plant stuff. See what happens. Enjoy.