Just run it, don't do that
Every engine is different and few NEED that much initial
ON EDIT - Sorry I was replying from a crappy laptop. If you were at 4-6 BTDC the exhaust could get hot and the engine could hold a little more heat. However, 16 is not going to make it cooler and you are likely going to have a harder time starting it, not to mention likely being more fussy on fuel.
Has it actually boiled over since you got the big fans on? At this point, let it idle and see how far it gets, if it doesn't boil over, let it climb, if it does get above 230 or even 240, or starts blowing out the cap (more than normal expansion), shut it down. My guess is you are getting spooked before you see what it really does
Keep in mind though, eventually that engine should get some sort of real heat into it, all this start and stop is no good for it. Maybe go find a tow company and talk to them, give them your route, tell them what you are doing, and then f you break down they will know you and come right out.
Again though, CHECK everything, especially seeing as you have reservations. Make your own list of anything that can loosen or leak, suspension, oil levels, belt tensions, water levels, double check and cross them out. At the end of you list, all that is left is a freak failure, and if you have a plan to get it home, no worries. You cannot plan for everything
One last comment, first ride should be like your mom is in the car and she is not happy. Drive easy, don't see what it has for power, just drive to a quiet place outside of town. After you get most of the way home, then if you care to give it a go, fine.