Welcome to an awesome community. I'm sure you will love it here! I have so far. Very supportive and engaging community. I just bumped into a post from a year ago that is perfect for every new comer. Hope this helps understand the up-voting system a little better. Cheers!
https://steemit.com/steemit/@averagejoe/what-i-ve-learnt-about-upvoting-on-steemit-the-10-commandments-of-upvoting