a great source of information is from your local agricultural agent, yes they do exist. may take some phone calls to find em. The King gives ya some real good advice too. A hint, if the seedling starters for veges are available at the local garden center, it's about time to plant em.
Talk to the people at a big reputable garden center.
I had a gardening thread a bit ago, it was here....
http://www.techimo.com/forum/t60736.html
If memory serves me, I think Mich. State has the big ag school program.
Start with a few transplants for the tomatoes and peppers. Seeds for the cukes, squash, corn, basil.
Tomatoes - determinate v. indeterminate varieties.... One will stay small and bushy, the other will need 6 foot stakes. The way I remember is that the determinate varieties are determined to stay small, thus bush type, though they may benefit from some staking too.
for onions, I'd go with the onion sets. growing from seed takes forever.
Do you have a feed store anywhere nearby? They can help alot!!
keep those questions coming!!! May not hurt to get a soil test done when starting out.....
Good Luck....