I am a not so beginner to LaTeX.I am aware of few classes and environments.But it took a lot of time for me to adapt to LaTeX.Documentations exists but are too heavy for a beginner.For example if I now want to lean koma script , I really find it a hard nut to crack.Can the tex.stackexchange.com provide video tutorials for basic introduction to the document classes of LaTeX and for finer tuning we can refer the documentation.May be I feel This is the only reason why LaTeX is not so popular among the masses.
texdoc koma-scriptdocumentation itself is a big gigantic task which itself is a bonus for users. But to reduce the barrier still lower and lower... Users should make some effort by Practice,Practice,Practice.. like any things in life.