Complex sentence: Always having a love for roots music, she started up a band comprised of musicians aged 13-17 called "Alysha and the Alleycats" and played gigs, parties and festivals around Ontario.
Split into simpler sentences: Always having a love for roots music, she started up a Roots band comprised of musicians aged 13-17 called "Alysha and the Alleycats". Together, they played gigs, parties and festivals around Ontario.