Ramba uchinyora ndima iyi - Miller akamirira Canada mumakwikwi akawanda enyika dzakawanda. Muna Chikunguru 2017, akakwikwidza kuchikwata cheCanada chakakunda menduru yegoridhe kuFIBA U19 World Cup
. Miller aiva neavhareji yemapoinzi 1.6 uye rebounds 1.7 pamutambo. Muna Chikumi 2018, aive chidimbu chakakosha chechikwata cheCanada chakabata menduru yesirivheri kuFIBA U18 Americas Championship. Miller akaita avhareji ye 17.3 points, 7.3 rebounds, 1.5 assists uye 1.2 steals pamutambo. Mukukunda semifinal vachipesana nePuerto Rico, akaisa 31 points uye 14 rebounds.