Hi,
Firstly take a good look at this guide, it is illustrated and detailed though concise:
https://www.thebuddyforum.com/honorbuddy-forum/gatherbuddy-2-profiles/112809-guide-private-gatherbuddy-profiles-pictures.html
You'll use a mix of HonorBuddy and in-game addons to make routines.
At the very least, it will prime you for the general principles of making your own GB2 profiles. It should be said that with WoD things may change significantly in the pipeline of producing private profiles (or the need for them), however it's good to get started with the guide above and to ask.
If you want to be a purist, and perhaps it's best if you're starting or want full control is to map the path yourself -essentially with your gatherer/druid/whoever:
* Fly to hotspot xyz1
* Switch to HonorBuddy, click Developer Tools and then Generate HotSpot
* Copy the Hotspot coordinates from HonorBuddy
* Paste them into the Hotspots of your GB2 profile
* Fly to next hotspot (xyz2), Repeat
Doing so you generally create a loop, and if it's *only* you using this profile then you won't have to worry so much about LCP detection. You should add hotspots as you go, and really the process may seem laborious but you can map a decent route of Jade Forest in under 30 mins once you get the habit down. There are massive advantages to doing it this way and of course you probably know most of them as you're enquiring to make your own so you'll know any time investment is worth it for a private profile.
If the purist method still seems too much hassle then do follow the steps in the link above, it's pretty easy to follow as long as you are careful not to miss a single click in the guide... I remember one part being a bit sketchy.
Hope that helps, let us know how you get along with your endeavours!
~G