I learned cooking by strictly following the recepy. If you do that, for example Pasta Napoli, you will be fine. It’s a simple recepy, but most people like it. And everyone can add salt, parmesan or whatever they like afterwards.
To a certain point, cooking has more to do with seeing what’s happening (when is water boiling, when are onions fried enough etc.) than tasting it. So you should be fine.
Also with Pasta, you just have to feel if it’s soft enough and since you are used to texture you should be even more fine tuned to it ;)
It depends, mostly on yourself and how you feel about it. Most artists have shown some form of shitty behaviour - Dave Grohl cheated on his wife for example. Is that enough to stop listening to his music? Probably not. Kanye West released a song called “Heil Hitler”…is that enough? Probably, but does that also count for his older songs? You decide. No one else can.