Help with fiddling with a mod's C#?

[Yo_Waddup]

https://steamcommunity.com/sharedfiles/filedetails/?id=2226725974

   I want to change this mod a tad so that the 'health' gene percentile also affects body size as well as the health of body parts. If possible, it'd also be fun to have it increase/decrease the visual size of the animal, though that would be going the extra mile. Does anyone know how I should go about this?

[RawCode]

mod is open source, what is exactly is your question?
if you want suggestions on IDE, grab visual studio 2019, uncheck stuff not related to C# on install.