Hi Kelly,
You can either use a small pair of pliers with some material to protect the nib between the jaws, or you can make a small tool, a Lamy nib puller.
The small tool consists of a little piece of plastic tubing, about an inch in diameter, about an inch and a half high or long if you like

, with a slit cut into one side of if, from the top to about half way through, as the water flows through the pipe, as it were. This slit needs to be about 3/4 of a mm wide at the top, runs down a little like that, and then narrows to extinction. I think you can use a metal saw blade for the top part, and a hot thin knife for the rest, or may a jigsaw you would use to saw thin little pieces of triplex.
Just make sure you smooth all of the rough edges with some fine sandpaper.
To use the tool, put the nib sideways into the slit (pen still attached), with the tipping sticking out on the inside of the tool. Slide the pen and nib down, until the nib doesn't go further down, and then pull the tool away from the pen in a movement that is an extension of the pen barrel. That's it.
Putting another nib in is hand work, so that may be a little harder. Just use some toweling to help, or a small piece of rubber, like a part of an inner tube of a bicycle, 2 inches or so. Just put the nib partly between the folds of the piece of inner tube, and shove the nib on.
That's it. Easy.
HTH, warm regards, Wim