A hand pump sure. But what if you do not have one. Learn how to make a skinny water bucket from pvc pipe and inner tube material. Or a one way valve and a pvc pipe and a bicycle.
The thing is you cannot remember everything so research all you can now, print it out, get reference books from 1900 so that you can improvise when there is no Lowes.
Going to grow food after TEOTWAWKI? How much water do you need and where are you going to get it. Really, a trickle system might use 1/2 inch a week. Times an acre is almost 60,000 gallons a month less rain that arrives at the right time. Surface watering would be about 120,000 gallons per month, more in sandy soils. How do you get that water to where you need it without electricity or fuel?
These things need to be figured out now, before TEOTWAWKI.
Improvisation is essential AFBS but having some things readily at hand will get one started. Given some basics I could fashion a plow. Pipe stock would be great to have on hand or hoses at least. Even McGyver needed some hand toolsto work his magic.