Landed a tech support role but having second thoughts.

I landed a job with Tesla as a tech support specialist but only for their solar/powerwall department. The job itself is a lot of phone calls, app troubleshooting, billing, and learning electrical/solar terminology. They're offering really decent pay and good benefits.

I'm really struggling to decide what's better for my career long term as I'm a couple weeks away from earning my Comptia A+ cert and think it would be more beneficial to get a help desk role. Though a help desk job isn't guaranteed, I just want to be able to apply what I'm learning and earn experience in a role that's going to matter to help me to advance my career in IT.

I have ambitions to make my way up to sys admin in a couple of years.

Any advice would be greatly appreciated.