They either give you the blatantly obvious or the intricate and complex without enough information to make it actionable. Lots of lists of tips and tricks that never really tell you anything. There's a lot of information out there on the internet. While the previous is the artistic part, mixing is the technical part. When mixing, polishing the final product is an active stage where you have to navigate the signal processing and effects plugins with knowledge and skill or you'll sabotage your results. It's a somewhat passive stage where as long as you nail your performance while dodging specific recording mistakes you'll be fine. When recording, representing your voice in the most accurate and pristine way is about what not to do.
There is the recording phase and then there is the mixing phase. The two most important aspects to ' recording and mixing vocals' is implied in that phrase right there.