You will have to find your hardiness zone before you can choose plants. Under 'Tools & Apps', find 'Zone Lookup' and enter your zipcode. That will help determine what plants you can grow.
But you also must consider whether you are planting in the ground or in pots, how much sun/shade your planting area will get. And what kind of soil is in your planting area. Do you have a water source?
Do you want to plant once and have those plants come back year after year? Do you want winter greenery? Summer flowers? Fruit? Vegetables? To attract birds? Do you want lots of flowers but don't mind replanting every spring?
Find your planting Zone and think about the questions I have asked. Then get back to us for some suggestions. If you can take some photos and post of your area, that will help us visualize.
Gardening is fun but the beginning of gardening always seems a little scary. We are here for you.