[2] Tišma learned to speak Spanish after a few months at Real Madrid, with teammate Luka Dončić helping him adjust.

[3] On 12 January 2020, Tišma made his professional debut for Real Madrid at the age of 17 years and 11 months.

[6] On 7 July 2021, Tišma signed a multi-year deal with KK Studentski centar (later SC Derby) of the Prva A Liga and the ABA League.

[9] Tišma represented Croatia at the 2017 FIBA U16 European Championship in Podgorica, where his team finished in fourth place.

[10] He won a gold medal at the 2018 FIBA U16 European Championship in Novi Sad and was named to the all-tournament team after averaging 18 points, five rebounds and 2.7 assists per game.