Doesn’t it just buy some favorite plants and stick them into the ground? Hm… sound not bad. But I’ll tell you, without a good plan, the amount to learn, maintain, and weed can rapidly knock you out.
To apply fertilizer/sand/seed evenly, you’ll need a lawn spreader. For a small lawn, a handheld spreader would do the job. For medium to large lawns, you’ll need a broadcast or drop spreaders.