Applied at dmdcommercialroofing.com for Unknown

I received an interview offer for a position that seems a bit suspicious. The pay is $26/hr for a week of training, then jumps to $36/hr after that, with full-time hours and benefits. The interviews are being conducted over private messages, and they want to schedule them very soon—possibly today. I applied through Handshake, which is where this message originated. I'm feeling skeptical about the legitimacy of this offer. Some comments I read suggested it might be a scam, especially since interviews over private messaging seem unusual. I did find out that the company, dmdcommercialroofing.com, has been registered since 2017, which adds some credibility, but I'm still wary. I think I might call their publicly available phone number to verify the offer before proceeding.