Based on what you have shown us in the picture, planting shrubs or food plots are going to do little to improve your bird production capabilities. If the cover shown in the picture is indicative of surrounding habitat, neither food or woody cover is your primary limiting factor. The old chicken/egg debate is in order here. Fescue is of almost zero value to birds for nesting, brood-rearing, or food. With the equipment you have, I would use the sprayer to kill the Fescue with Journey and follow with a spring seeding of NWSG and forbs. Then, a limited planting of some kind of food plot or shrubs might be in order. I guess I'm too blind to read the state on your avatar, but knowing where you're from might modify this prescription a bit. The design of your food plot/shrub plantings should be thought out so as to facilitate the management of the future NWSG stand as well as maximizing the value of the various components by making the proximity of the various parts most beneficial to birds. That means birds should not have to go far to get to food or escape cover. Food should address all life stages. A no-till drill should be available through the NRCS, Extension, or Wildlife Dept to plant your grass/forb mix. The disk will work on the sod, but will take numerous passes to break down the sod. Planting can be accomplished by drilling, planting, or broadcasting. Shrubs can be completely accomplished by hand. With the woody cover in the background and foreground, this component may be able to be minimized within your acreage to some extent. Brush piles may be substituted for some woody plantings.