It's all about how much Steem power you have, the more steem power you (which is not delegated), the higher your vote will be and therefore the more value it will add to a post.
Currently your Steem power is 3.196 SP + 11.904 SP delegated by Steem, based on the current Steem price this means that your vote is worth $0.00, this is because it doesn't reach a cent yet, however it would have a small impact on the overall value on the post. Based on the current Steem price you would need to be ~95 Steem power for it impact the value of a post by $0.01. If you want to keep track of how much a certain amount of Steem power will impact the value of the post you can use this handy tool which can help you calculate vote worth:
Either invest in Steem, or post more to earn more Steem.
Hmm making your vote to add value to a post is easy. All you need to do is to change your voting pattern. For example if your sp is 500 your upvote will be worth about 0.02 to 0.03 SBD/steem. To make sure you add about 0.02 to 0.03 SBD/steem, you will need to maintain your voting power at 90% minimum, which mean you will need to vote at interval say 2 to 3 post per interval until you Upvoted the ten post.
Lower vp will result to little or no vote value.