Am I practicing wrong or right?

[ReneAigner]

Also, I do think it's harder to practice "wrong" than you may think. It's more of a case of studying okay vs studying really well. 

Thousands of people spinning their wheel and not getting anywhere prove you wrong. How many incompetent artists are out there for any one artist who breaks into the industry? How many of them have tens of pages on deviantart filled with the same stuff (usually only from imagination without references, no actual studies or only photo studies slavishly copied), done over and over and over, over the course of many years? How many SBs are there on CA of people grinding away for years and never getting a job or reaching any level of proficiency? Time is important, but it's not everything, far from it.

Visual art is like a language. Talking all day, without learning the rules and using deliberate practice, won't make you more proficient in the language, you'll just grind your own idiosyncrasies and bad habits deeper and deeper into your brain until they can only be removed laboriously by highly skilled educators.