^
Not too much, or you will end up like your avatar there.
I'm currently singing Queensryche. Walk in the Shadows to be precise, and any singer (who has tried it) will tell you, it ain't no easy song to sing... I think. It's taken a long time of technique building and general practice, but I'm there now (maybe not quite... No, I'm not actually there, but I'm closer than I was before). Always improving... Though I should really be practicing the Avantasia song I chose for performance assessment... Which is coming up I think. Might do some other school work soon...
...
Did you really believe me about the school work!?