Does life seem like a never ending confusing set of vocal techniques?
Just as you have learnt about vocal tone, you may be focusing in on pitch, then working on ironing out the differences between your chest, mixed and head voice.
To produce a slick & professional sounding voice all of these aspects of singing are the foundations. Of course you may also be working on your songwriting and emulating the sounds of your favourite singers. What I suggest is to take it week by week. A good vocalist has great listening skills which is why I recommend to all my vocal students to record themselves whilst singing to measure just how in tune they really are!
If you would like some help with this come & have some one-to-one singing lessons at Brighton Electric Studios