Myself on steemit

It has been around a couple of weeks of me on steemit and lately i have been enjoying it a lot because i get to see many post related to every sectors i wanna know like #travel #lifestyle #food #art&music ,etc and i have collected alot from steemit and i have no regret on being a member of the steemit but its been a while that i havent been able to figure out about steemit's policies, payment methods, promotion of posts ,etc

I have posted more than about 20 posts now but i am still not satisfied with my upvote's but i know that it because its a new account . i enjoy myself on steemit rather than facebook . how about you guys ?
please my friends and everyone please help me with steemit .
and i had a question in my mind that why does my upvoted $'s are reducing day by day , I posted a post once and it got about $28.79 and day by day it was decreasing day by day by a $ and at the day of payout i got only $14 transfered to my account .!
help me with all of my questions and i will be sure to follow you and support you by somehow !
thank you!