Your question is many questions on one. Let me try to give some basic assistance and refer you to some online resources for more information.
The lawn should benefit from the aerating. Try to keep the soil moist but don't water any more often than you have to. A good soaking followed by a drying out period is the best schedule to follow. After seeding give it a few weeks and then fertilize lightly. The following web sites will help:
New gardens often struggle the first year as the soil amendments and native soil mix mellows and the microbial population changes. I think your next year will be better. Make sure the site gets plenty of sunlight and fertilize moderately using a turf type fertilizer with a 3-1-2 ratio of nutrients. About a half cup per 25 square feet is about right for an application in most cases. The following web site will be of more help to you:
Fruit trees and bushes need lots of sunlight and well drained soil. Here are some other sites for lots of great info on growing fruit in your area:
Hope this helps!
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