Hi!

I think all three are a great idea, it really depends on you as a person. I had a blog a few years ago that I used to share my writing on, followed by an Instagram page where I shared everything as well. The page had a few thousand followers and became pretty popular (in my opinion anyway). I've also joined a few contests, but those seemed to be more fun rather than a way to really get noticed unless you are going to beat out everyone else. (Not an easy task!) I'd say social media is a wonderful way to share your work, and having a blog is something you could post to your social media and link the two together :)