HelpNew to thils

So I found some reliable source code to work with and I'm wondering what I can do within that code to change the signature to not be detected. I don't want to release it I just want to tweak it so that I can use it for my personal use without a high risk of getting vac. Can I just add some random code? Change some variables?

No, be creative. change the logic behind the code, re-write it, etc. If you're "new to this", you shouldn't be trying to do this. Don't look at the source until you actually learn the language it's written in.