Practice...practice.....practice!
Most can be fitted easily, after laying-out/untangling first.The swaged cable joint-ends usually go at the top-inner of the tyre`s shoulder (slide the straightened chain-set, in from the rear of the car and then reaching each hand around the side of the tyre and picking up an end of the cable).....the chains and outboard securing band/link are pulled outwards (around the tread/outer-side-wall), the outer ring joined (usually with a link) and adjusted until the set is sitting evenly and tightly: some tension using a rubber-link, coil-spring or (like mine) a ratchet to tighten.....there`s usually no need to jack or rotate the wheel when installing; although sometimes when removing the set, the joint is in the wrong spot and you may need to move the car a bit to reposition it at the top of the wheel for easy undoing.
It really is easy....once you`ve managed to do it properly (twice) you`ll wonder why it ever seemed tricky before!

I can fit mine in two minutes per wheel, whilst in deep snow and lit just by flashlight; but, the first couple times of use took a fair-bit longer.
You`ll be amazed at where you can go (even on sheet ice hills) with chains....enjoy. 8-)
Annotated pic showing typical chain parts:
