That sounds like a great effort considering the time you´ve been on steemit, i would definitely want to read a post about it, you should join.
To vote for witnesses you need your active key. Go to the link at the end of the post and all you need to do is vote for the witnesses you approve. To read about what they do for the platform, just click on their info button.
Don't forget about those not in the top 50
https://v2.steemconnect.com/sign/account-witness-vote?witness=<insert favorite witness name here>&approve=1