This post is from a low-reputation account and contains an unverified outbound link. Be cautious before clicking external links.
This is tutorial on how to install VST3 on Fl studios
Put the file in C:\Program Files\Common Files\VST3
then go to manage vst and find it. After that enjoy using the vst.
misstortion plugin: https://nimble.itch.io/misstortion
Learn to create your own VST with C++ : https://amzn.to/3jNFYqv
▶️ DTube