Ground is still too wet. Have to wait till it drys out a bit to till. Also, shouldn't really be planting a lot until the last frost, which I beleive is scheduled to be around the last week of April here in Ohio this year.
You should definitely be starting your garden plants indoors by now, or in a little mini greenhouse. You can get little ones for < $100, and they will be big enough to start pretty much anything you would want to grow. We have a little one that we use indorrs with sopme grow lamps, and it is enough to get started on our 12,000 sq ft garden.
For a insecticide, try using Neem Oil. Organic, and it doesn't actually kill the bugs, it just tricks them into thinking that they are not hungry....so, they do not eat. It also keeps away funguses like powdery mildew. Good shit.
You may also try plating garlic, marigolds, or peppers around plants you want to prtect, as most pests tend to shy away from those.
For weeds, you can either use a little cultivator like a Mantis, or you can put down ground cover around your plants, like straw or a plastic tarp.