Herbicide,seed, fertilize what order? - hay newb

Hi All,

Thanks for everyone's help with my last question.

I have some false dandelions that I was told I have to reduce for my horse hay.

After the field is cut, can I simply over seed with a good horse mix, or do I have to plow it and seed from scratch?
If I can over seed it with my seed drill, should I hit the false dandelions with herbicide first?
How soon after can I seed if I spray herbicide? And where in all of this should I fertilize?

Please accept my apologies in advance for my ignorant question, but my first job is a computer tech, and i am trying to learn to be a farmer as fast as I can!

Herbicide,seed, fertilize what order? - hay newb