I feel you I didn't even know that people did bases or collabs or how to use them untill my ultimate online and offline bestie helped me UnU I suggest just using bases and collabs before making them so find a base or collab look for a link to a file they will tell you if it is a file then copy teh link paste in a new tab (BTW This on a computer.) Then you need to press download that is all I can say hope this helps

My pc broke so I'm using a phone rn so I cant collab.