This isn't a 100% explanation but it's how one of my professors explained it as a way to get comfortable with it: let's measure an electron and assume said elec

This isn't a 100% explanation but it's how one of my professors explained it as a way to get comfortable with it: let's measure an electron and assume said electron has a well defined position and momentum that we just don't know. Let's say I want to know the position. How am I going to do that? Well, by throwing a photon at it. If the wavelength is small we can find the position fairly accurately but it's going to transfer momentum to the electron and we really don't know how much and it's a relatively major effect. Hmph. Alright, let's measure the momentum instead. We need a longer wavelength so we don't disturb the electron too much. Great, we get a very good value for the momentum! But, unfortunately, the long wavelength is not very accurate for determining the position. Other intrinsic problems arise even sticking with the photon idea but hopefully this is enough of something to latch onto to help you start to understand.