I was recently pulling weeds and I noticed that there is a hole at the bottom of my concrete stoop. I'm not quite sure on how to address it. I'm pretty handy so I'm sure that this can be tackled without professional help (and prices). Can anyone point me in the correct direction?
That's not a hole. That's just the bottom. Steps like this are poured on the dirt, and while the dirt level probably should have been flatter and lower (for aesthetic reasons), this isn't a structural flaw.
Attempting to patch it will make things worse, visually speaking. Put some mulch over the bottom edge or raise the soil level a bit and be happy.