Observation, look at gardens and look at people doing gardening.

Practice and start easy.

Books, read lots of books.

I would start with herbs, they are really tough and you can eat them. Nasturtiums and radishes are great for planting from seed, really easy.

MONEY. Gardening takes money. Money for tools and seed and fertiliser.

Remember when you are looking at other people’s gardens you are looking at their successes, you haven’t seen how many plant they have killed!