Reply to getting better at producing?

i have seen alot of posts about people asking things like "how come my music doesnt sound very professional?" or "any tips with this or that?" and most people answer with "you need to practice" and then i wonder what about a music course or music school? would that help? cause i have been producing for a while now and i did make some progress but i lack knowledge in example understanding VST's or why things happen when for example i tweek a knob things like that how did you guys learn that?