Hiring a 1st line operator –> practical tips to hire someone?

Good Evening,

I’ve been promoted team leader a couple of weeks ago and I have the responsability to hire a new 1st line operator for our support team.
I had a look through all the articles to find tips and tricks on how to make a good choice when hiring people.
What would be your advices? Which questions do you think are important and which aspects have to be taken in account. I have the basics, but I’d like to get some practical tips as it’ll be my 1st experience in hiring someone.

Thanks!

Thomas