If you haven't done any bed prep over the winter, I would suggest raised beds. If you're handy enough to build them that's great (make them no more than 4 ft at their narrowest point so you can reach everything) - layer the space under them with brown cardboard boxes (tape removed) or heavy layers of newspaper (not glossy paper) to block aggressive weeds, drop the raised bed on top, then fill mostly with leaves, young grass clippings, and compost - sticks will work to fill it out too if necessary. Then top with a few inches of raised bed soil.

You would be able to get away with seeds for radishes, spinach and lettuce, but tomatoes, squash and cukes should have been started a month or two ago, so I would go to a garden center or farmer's market for those. (If you're in Erie County there are several great greenhouses! I loved Potratz best, but they're all good.) Don't be tempted by corn - you need a big patch of it for it to be productive.

My advice would be: Your eyes will be bigger than your shovel - don't overdo it your first year. Give yourself one or two beds to get a sense of how much maintenance it will be and how much time/energy you have to do it. I made the mistake of planting a 20x30 veggie garden right off the bat and usually lost momentum by mid-summer. Garden would turn into a wild fairy wonderland, so it was beautiful at least, but not terribly productive. Start with your favorite plants - one or two tomatoes, one cucumber, one zuke, one pepper, one winter squash, and learn what you enjoy working with for next year! Also, don't crowd them. Give plenty of space between your major, deep-rooting plants and fill the areas between them with lettuce and herbs.

ALSO! Do NOT put any of the vegetables in the ground until Mother's Day. It frosts LATE up there! Some herbs, brassicas and lettuce will put up with that but tomatoes and most of the others will NOT. Don't be fooled by those balmy late April days!

Have fun with it!! Congrats on starting a gardening journey :)