Hey guys...this year I decided to start my first garden (at the age of 21). A few months ago I tilled the area that I planned to put the garden, which is about 100 square feet. I also got the soil tested, and applied the recommended fertilizer components (which I think was 3.5 pounds of 5-10-5 and .5 pounds of super phosphate). I was pretty much forced to put the garden at the bottom of the hill because that is where it would get the most sun, and have noticed that it has some drainage problems. Because of that, and to help out the soil, I had 2 "ton" of a mushroom manure/topsoil mixture and added it to the garden. It's now about a foot above the rest of the land, and I realize I have to have some sort of raised beds.
My main question is should I quickly try and mix the newly added soil to the previously prepared soil, which would involve a lot of manual labor and turning soil over and over, or just try and wing it and do some stuff to the topsoil/manure mixture (in which case I would need your advice) and mixing the soil later?
If it matters, I plan on growing 3 different types of peppers, tomatoes, zucchini, and snap peas
Thanks for any help guys...i'll try to help and clarify any questions you may have, as I know I probably didnt explain my situation as well as I could have.
My main question is should I quickly try and mix the newly added soil to the previously prepared soil, which would involve a lot of manual labor and turning soil over and over, or just try and wing it and do some stuff to the topsoil/manure mixture (in which case I would need your advice) and mixing the soil later?
If it matters, I plan on growing 3 different types of peppers, tomatoes, zucchini, and snap peas

Thanks for any help guys...i'll try to help and clarify any questions you may have, as I know I probably didnt explain my situation as well as I could have.