The Play by Post itself starts here.
Out of Character discussion can be had here.
If you're a newcomer, and would like to join the fun, this PbP runs on the Basic iteration of the 5th Edition Dungeons & Dragons framework.
- D&D Basic Rules PDF (November 2018)
Even though I'm going mainly with the Basic Rules, I'll allow the human variant (for human PCs only):
Ability Score Increase. Two different ability scores of your choice increase by 1.
Skills.You gain proficiency in one skill of your choice.
Feat. You gain one feat of your choice. (PHB Ch. 5) (Contact me via PM if you do not have a copy of the PHB)