Your vote value is based completely on your STEEM Power which you can see in your wallet. One way to gain STEEM Power is to curate content, that means resteeming, liking and commenting. Gradually that will gain you STEEM Power. You will also gain STEEM Power for posting depending on what payout option you use when you make the post. You can also buy STEEM Power for bitcoin or power up your existing STEEM. Best of luck!