my favorite type of music is heavy metal 
Metal takes influence from many genres such as blues rock. It's also known for it's overall loudness and amplified distortion.
do you know when and where heavy metal actually started?
Yes, actually. It developed in the late 1960s and early 1970s, largely in the United Kingdom, believe it or not.
to me heavy metal started with Black Sabbath but I guess there were bands before them
Black Sabbath
Black Sabbath were an English rock band, formed in Birmingham in 1968, by guitarist and main songwriter Tony Iommi, drummer Bill Ward, bassist and main lyricist Geezer Butler and singer Ozzy Osbourne. Black Sabbath are often cited as pioneers of heavy metal music. The band helped define the genre with releases such as "Black Sabbath" (1970), "Paranoid" (1970), and "Master of Reality" (1971). The band had multiple line-up changes, with Iommi being the
Heavy metal music
Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom. With roots in blues rock, psychedelic rock, and acid rock, the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion, extended guitar solos, emphatic beats, and overall loudness. The genre's lyrics and performance styles are sometimes associated with aggression and machismo.
In 1968, three of the genre's