This forum is closed for good. Expect new things to come.
In the mean time, I recommend you check the following places: VPW2 Freem, AKI Outsiders or MPire Mall Discord servers. If you really don't like Discord, there is the r/N64WrestlingGames subreddit, but there's no active development of mods/hacks there. Sean O'Connor's Youtube Channel is also recommended.
when adding beard to textures,
i use photoshop
-make a new layer
-select paint brush
-right click and select a brush that have many scattered dots(for stubble) or many long lines(for long beard)
-then on the new layer, use the brush on the desired area
-make other changes to the thing you drew(hue,saturation,layer opacity,erase unwanted parts,etc.)