Is there a tutorial / introduction on voting for delegates? I just signed up at https://semux.info/pool, and not really sure how to proceed.  Thanks.

UPDATE:

I believe voting can be done from the semux wallet.  Still have a few questions.

How many votes can I make? Is there a limit?

Is there a particular stat of each delegate I need to look for when choosing who to vote? Or can I just vote for anyone randomly? 

I think there is also a note on the website to encourage voting for those delegates with less votes. Why is this?