This is an easy and beginners friendly pattern.
The final diameter of the necklace with the material that I used is about 70cm but it is easy customizable. In case you want it longer do not forget to add more beads before you start crocheting.

Gauge is not important since it can be made with different yarn weight and bigger beads.

For this necklace the materials you will need are:
Less than 12m fingering 4 ply yarn
162 pieces glass beads
hook size 2,00mm
stitch marker (optionally)
Scissors and needle to weave in ends​

The most time consuming part of the pattern is to string the beads onto the yarn. I did some internet research and found a method that did worked great for me. I used fingernail polish at the end of the yarn. The polish hardens the fibers of the yarn and it is easier to get the beads onto it. So it would be very helpful if you had some nail polish too. Otherwise, a needle thin enough to pass through the bead’s hole could do the same work.