You can't learn it all. Some things are better left to professionals. I once had a leaking bathtub. I watched some youtube videos and was able to fix the problem (replacing a gasket). However, one time my HVAC stopped working in the middle of winter and I wouldn't know what to do there. Had to call in pros. few days ago, I had a yellow jacket nest in one of the ceilings (yep!!). I wouldn't want to fix that myself.