hi im new here and like some help getting started with mods iv never done them before

i would like to know where to get started

im also looking for some chars i cant seem to find

one of them is Babidi and any other of his minions i saw some videos so i think they r out there

i have all the models ripped from dbz bt3

if any one wanted to teach me how to make the chars or want the moddels to make i can put links i dident rip them but i found them scarping the web

also if some one could teach me how to add slots

cause i dont want to replace any chars just add more

thank u for any help