After starting his career with the local KPV, Forsell was signed by a near Veikkausliiga side VPS in 2009. After struggling to make it in the match squads at Vaasa, he left after only one season, switching to a fellow Veikkausliiga side, IFK Mariehamn. At Mariehamn, he began appear more regularly and soon attracted the attention of much bigger clubs in and outside of Finland. On 9 August 2012 he was selected as the player of the month, for July.