Welcome to Steemit and nice to meet you. I hope you will find this community amazing. I would suggest to read the FAQs which will give you a clear idea of what Steemit is and how you can use it.
You can also read this wonderful beginner guide by @ethandsmith
https://steemit.com/steemit/@ethandsmith/the-beginner-s-guide-to-steemit-part-6-voting
All the best.