I do the Scott's program and my lawn always looks pretty good. It's too late to do anything about the crabgrass, so let that one go. You can get sprays to deal with crabgrass, but I've found that they kill the grass you want ot kjeep as well. Might as well use round-up . . .
You can still use Scott's Plus 2 to get rid of weeds, especially dandelions. Clover is a bit more resistant to Scott's, so you might want to get a jug of Ortho Weed-B-Gone. It works pretty well on clover.
In august , use Summerguard to give the grass a nice fertilizer boost. Lastly, in early October, use the Winterizer. You will be amazed at how healthy the lawn is next spring. Speaking of next spring, that's when you want to use the Scott's with Halts to prevent crabgrass.
BTW, congrats on the new home!