Yep, feel free to make requests! Just share the list of icon file names you’d like to see changed. You can usually find them in the .desktop files, located at /usr/share/applications or ~/.local/share/applications. A bit of digging should do the trick.
I’m definitely open to collaborating — always nice to have more hands (and ideas) on deck!
Here’s the repo if you want to contribute directly: yet-another-monochrome-icon-set
The only requirement: keep it monochrome and adaptive 
If you’re interested in trying Inkscape, go for it! I’m still learning myself, so we can figure things out together. Feel free to join the discussion here: Tips & Tricks: Inkscape
Not sure what you’d like to know — or maybe you already know more than I do 
Heads up:
Inkscape is kinda addictive. One moment you’re tweaking icons… next thing you know, it’s 3am and you’ve redesigned your whole theme 