Welcome on board, rabbit hole! Anything about quality pen making is one hell of an addiction and can be very costly or done on a budget..
There are a few great kitless makers on here and would recommend that before investing in triple start taps and dies is start with the fine thread off the shelf metric ones. That will get you in to using taps and dies in the likes of acrylics before you invest in the triple/double start ones.
I’m not affiliated with this company in any way but I certainly use them for tooling and can vouch for them in great customer service.
[URL unfurl="true"]https://www.tracytools.com/[/URL]
Enjoy..