when did the latter begin his musical career?
2004
Ed Sheeran
Sheeran began recording music in 2004 and independently released his first collection of work "Spinning Man". 
who is the song everything has changed about A guitar ballad combining folk and pop genres about "wanting to get to know a new lover better". who is the singer? Taylor Swift and Ed Sheeran when was it aired? July 16, 2013
wiki:20835279
Ed Sheeran [SEP] 2004–2010: Career beginnings
Sheeran began recording music in 2004 and independently released his first collection of work "Spinning Man". He has been friends with fellow English singer, Passenger, since he was 15, with the two playing the same gig in Cambridge. He moved to London in 2008 and began playing in small venues. In 2008, he auditioned for the ITV series "Britannia High". He also opened for Nizlopi in Norwich in April 2008, after being one of their guitar technicians. He released another EP in 2009, "You Need Me", just before going on tour with Just Jack. He also collaborated several times with Essex singer Leddra Chapman, including CeeLo Green's "Fuck You".