I owned my own well drilling buisness and pump installation company for 36 years, so yes I guess you can say I have done a few. Many many mistakes can be made by the novice handyman. About 2 wells a year were totally ruined by do-it-yourselfers. First and foremost get the right sized pump. When preasuring up a captured air tank, you must anticipate this when buying the pump. Basic rule of, to overcome this tank and friction loss, you must assume your well is an additional 125' in depth. Second dont oversize your pump as this can continually create dirty water. So many more, so little time. Good luck and by the way check local laws, here in Colorado it is illegal to install your own pump without first passing a test.