HI @shahee-w - great question. The consensus is reposting content from places like FB, Twitter, Instagram, YouTube, etc. etc. is grudgingly acceptable, especially if your intent is to put your content on the blockchain. You probably won't get stomped for that but it's always good policy to have a little disclaimer stating that you are reposting from XYZ.  

The bigger no-no is reposting something you've already written on Steemit. Some people do it and justify it by saying they were new and didn't have the followers and therefore didn't earn anything. 

I am a stickler with that. I say don't do it. 
Perfect example: THIS POST. It's only made 76 cents and I get more volume on it now than I ever did 10 months ago. I'm not making any more money on this post. That sucks but that's the way things are right now. Again, if you're going to repost your own content, give people a heads-up. Be honest about it. Give them the opportunity to upvote you again or move along. 

btw - Welcome to Steemit!  Shout out if you need help :)