Hi I am new here where I can found more info before giving my vote
You don't give a vote, it is not a democracy. You just use the wallet you want to use. In a nutshell;
If the majority of the hashrate, (or the trigger could be 75% of X last block out of the last 1000) use a certain wallet, then it become the main branch, since the majority decided that the current Bitcoin is to be scraped.
However this is hard forking and most people do not like this. I don't.
Since mining to your own Bitcoind is not really a good idea, what you can do is point your miner to a pool that will put that weight toward a different wallet (the one you want) than the current bitcoin core.
Right now there is nothing trendy, so nothing for you to "vote" for. There is not a government here to push an election, hence no executive authority over voting for or against something. So unless something is trendy, there will be nothing to "vote" on.
TLDR: You vote with your hashrate, but there is nothing to vote on at the moment.
