where are you located? so that we can hopefully direct you to a local capable piecer? or you can check the map that @yeka provided for you above.
alternatively, depending on where you are in the world,
https://labs.ksec.co.uk/cyborg-centers-worldwide/
hopefully the piercer doesn’t need a guide, but here are a couple more videos to accompany @mrln 's video and @JennyMcLane pictures that may assist
@JPlowman post
🩸 xG3, xSIID, getting tased, and another xG3 an interesting two weeks the first video shown is a blade/knife edge install and a great write up in its own right.
(also shared in this thread
Install Videos and Pictures 🩸 - #96 by JPlowman)
and @Rum 's great video install post