Complex sentence: I began editing Wikipedia as an IP contributor, mostly making small spelling corrections, and created my account on 22 September 2009, although I did not begin actively editing Wikipedia until October 2010.
Split into simpler sentences: I began editing Wikipedia as an IP contributor in 2009, mostly making small spelling corrections, and created this account on 22 September 2009. However, I did not begin actively editing Wikipedia until October 2010.