From my experience so far:
Do not spam links or sexting in the chat , this is how I got banned on the first account.
about upvotes, go slowly at the beginning, I send only 10-20 upvotes per post to gain some traction no need for more, if it's a good post and you posted at the right time it will go popular by itself..
warm up by making comments in random posts like a regular user. Askreddit, memes, questions , celeb gossip etc.
Do not post the same picture on different accounts without changing the hashing (repurpose the content).