The Academy
From Jenny Everywhere Wiki
Time Lords studied at the Academy. In the 89067986779811167562948736197891674912223184th Universe, Andro had been a “top student in his day”, though he went on to work an unfulfilling position as a Time Technician due to “not applying himself”. It was possible for a young Time Lord eager to get their hand on TARDISes (albeit as a repairman rather than pilot) to “fast-track through the Academy” to become a Junior Time Technician; the Doctor had once considered this option. (PROSE: How To Steal Timeships & To Influence Time Lords)