[4] He played youth hockey with Kajaanin Hokki until the family moved to Ylivieska, where he and his brother joined the Ylivieskan Jääkarhut [fi] organization.

[5][6] Entering the 2019–20 season, Hämeenaho, his brother, and teammate Valtteri Viirret [fi] moved to Pori to play for Porin Ässät.

Playing right wing on Ässät's fourth line with Kalle Myllymaa and Niklas Appelgren, Hämeenaho had 13 minutes of ice time.

[12] Joining Ässät's under-20 team for their playoffs, Hämeenaho recorded 12 points in 6 games en route to a championship victory.

[2] He made his international U20 debut representing Finland at the 2023 IIHF World Junior Championship, scoring 2 points in 5 games.