The following limited set of instructions is a copy of those relayed to a user who assisted in the the creation of my ConfigureLimits mod. While a proper guide will eventually be written, I am recording this in the case it may be useful to others.
Initial Setup of IDE
1. Like the install instructions on my mod page (ConfigureLimits on NexusMods), I downloaded BepInEx and put it into Grow's root directory in the steam library, then ran the game once to generate all the extra directories/files I'd need
2. I downloaded and installed Visual Studio community edition, which is free for everyone: https://visualstudio.microsoft.com/vs/community/
3. Launch Visual Studio and click on 'Create a New Project'
4. Choose the Class Library (.NET Framework) option, check the box to place solution and project in the same directory, then click Next
5. Adjust any project or solution names as you see fit (this will be the name attached to the .dll file you create) and make sure that the framework selected is 4.7.2 (this is the version compatible with grow)
6. Note the directory the project will be created in, then click Next
7. After a few seconds, the project will be created! Now we can move on to part two...