As for Mozarella:
I have only made it once but it turned out absolutely perfect, not the slightest bit of rubberiness, just that soft but firm layery mozarella bite.
I remember following a video to the absolute letter so I just dug it out, but forgot that it was actually in German. Still, I think the secret is mostly in the 'pulling' part from about 4 minutes onwards which doesn't require any translation.
They also have an English video, I'd assume that the process is pretty much the same but I haven't specifically compared the video.
The German video, 100% success guaranteed:
https://www.youtube.com/watch?v=M0yOZ71OeOg
The English language one:
https://www.youtube.com/watch?v=-YIYjOFwLWw
Overall I have stopped cheese making for now, I find the the few hours of work and waiting time are in no comparison to the 30 seconds it takes me to eat the end product.
At least with a keg of beer the drinking time usually exceeds the time spent at brew day.