If you enjoy gardening (and have a yard!), there are ways to make it easier. The first is obvious -- a riding mower, preferably with a self starter. This can be a real morale booster.
The second is old fashioned but good -- a small floral or scuffle hoe. These are light and easy to handle. Cut down weeds while they are still small and leave them where they fall, good mulch.
Some other easy-to-handle, lightweight tools are a floral rake which is about 7" wide; a three-pronged cultivator with a handle about 3' long and a nylon garden hose which rolls up flat on its own reel. One of these hoses, 50' long with its reel, weighs only 2 1/2 lbs. And can be carried in one hand.
Another great boon to some gardeners is a folding stool. If bending over cuts off your wind, try gardening sitting down. Use a long handled spear type weeder, a clam rake about 18" long for leaves and your pickup scissors or tongs which are useful for removing gardening debris from the ground. These few short hand tools and the aforementioned folding stool can all be carried in a shallow garden basket.
Here's how to make an easy flower garden.
In the fall, gather as many seeds as possible from easy to grow hardy annuals. In the spring, sow (each kind separately), scattering by hand in prepared beds. Rake in and tamp lightly. When they come up, hoe down all but a few. What is left will give you a nice display without the hard work of transplanting seedlings.
If you live where there is no space for your own garden, you may be able to have a window box or several shelves for plants inside the window. Even in a limited space, growing things can be one of the most rewarding pursuits there are.
It is important to know if you are allergic to the things that you grow in your garden and lawn. If you are and don't want to give up your gardening, use a dust mask when you work.