Hi - Meema... It's best to start of in a small way, by growing plants that are easy to grow, like small tomato plants, say two or three different varieties, perhaps some peppers again try a few different varieties.
Now tools everyone starts of with a few tools, but as time goes by you end up with all sorts of tools, big in size, as well as small tools, if you have Family you will most likely get tools as presents, from Family, and Friends, and like minded Peepul to your-self.
Gardening... comes in three different sizes in my mind. You start of in a small way, then you may get the Bug for growing all types of Plants, Shrubs Trees and Garden Plants, Greenhouse Plants, Houseplants, the range is absolutely fantastic, my self I am addicted to Garden Centres, and the like, you go out looking for a Bargain, and end up spending Mega Bucks, Gardening is one of my addictions, by I am also an Aviary Culturist, & The Friends of Groups, as in Parks, & Green Spaces.
I hope I have not lost you here, but I could be addicted to worse things, as you may know but with Gardening pursuits, their are No bounds, and No end to the learning curve once you start, and some of that learning will stay with you, and some bits will drop of, so this is where Gardeners World. Comes in real handy and as Gardeners, wee all learn of one and other, their are No Professional Gardeners as such, its just some of Us know and remember more, and being as their are No Professionals... it takes out any kind of Snobbery and puts us all on the same footing and as it should be in this really Great Hobby, of Gardening.
I sometimes go over to South of Ireland to see some Friends over their where all types of Gardening is high on their agenda, but so is keeping Pigs, & Poultry, all for their own private use in the main, they don't tend to sell things, it's more a swapping of things for other things, I have to much of something, i swap with you for something this way know money changes hands.
Sorry Meema... But being a mear Man i have drifted here and their to my likes as in hobby's and Gardening & Gardening & Gardening things.
Hope this somewhat Help's