Is this safe?

I’m far from being an internet weight cop and with that said, you will be right at the practical limits of a srw truck and of course well over payload rating. 
A few things to consider. This being your first camper and your inexperience at towing much less towing basically a semi trailer, and your perceived lack of understanding, it sounds like a horrible idea from here. 
17” wheels = base model truck and the tires are surely not up to that weight rating. At a minimum I’d be somewhere between some heavy rated 18s or 20s rims and appropriately rated tires. Or 19.5s. 
If you’re experienced, equip the truck right and keeper out of the mountains it’s semi reasonably doable imo. But not with how the truck is currently equipped. 
And I with more knowledge and experience wouldn’t even want to tow that thing with that truck on any significant grades or curves.