He attended HTS Daniël Pienaar in Uitenhage, and earned his first provincial selection in 2013, representing Eastern Province at the Under-16 Grant Khomo Week, scoring tries in matches against the Blue Bulls[3] and the Golden Lions.

He represented the George-based SWD Eagles at the premier South African high schools rugby union tournament, the Under-18 Craven Week, in both 2014 and 2015.

[9] At the conclusion of the tournament, Libbok was included in a South Africa Schools team that played in the 2015 Under-18 International Series on home soil against their counterparts from Wales, France and England.

[14] Libbok was also named in the Blue Bulls squad for the 2016 Currie Cup qualification series and he made his first class debut on 8 April 2016, starting as a fullback in their 16–30 defeat to Western Province in Round One of the competition.

[16] He also started their next match against Gauteng rivals the Golden Lions[17] and played off the bench in their defeat to the Eastern Province Kings in Port Elizabeth.

He finished the competition as the Blue Bulls' second-highest points scorer,[28] and helped them to second place on the log[29] to secure a semi-final spot, at which stage they lost to Golden Lions U19.