I am a newb at coding, but I can at least try as it shouldn't be that difficult compared to major version ports. I could try to do it myself, I just need to know where to start.

edit: didnt wanna repost after i read issues and understand now you're not likely to do a 1.14.2 port

Should just be a case of updating the build.gradle, since there's already a 1.14.2 vanilla artifact on the maven. In particular line 141. I wouldn't expect anything to break baritone between 1.14.2 and 1.14.4 but it's possible.

There have been countless issues regarding backports. There wont be one.