For my 1st attempt I was lucky enough to find Chucks (LTNBOLT) site and found a wealth of info.
USE THE RIGHT TOOLS
I did find that a telescoping magnet was the biggest help with the coil packs 7mm bolt. Little bolts have a nack at finding hidden crevises in any car.
I turned a spanner or two in "my day".
I never said your hands wouldn't look like hamburger.

 

I found using a piece of masking tape to attach the 7mm coil pack bolt to the socket during installation reduced my frutration level and the time required significantly. Get the bolt started and pull the socket off then switch to socket with no tape and snug the bolt

Doug