which 3d software should i learn for 3d printing —

Founded which 3d software should i learn for 3d printing models & stl files for printing
Mandala 2 arcs
WebmasterZero
Flash ring
Noorullah1
Man Woman
Noratlas
CryptoLogoLamp
PopaValentin
Dual Shock PS4 Stand
Sebastianieto29
Sphere Trapped in Cage
Triangle Man
Smashing Wolt
lnewton1
Son of Ugolino
Musée Rodin