I am no expert but I've had several windshields damaged by debris on the highway.
I would tape it inside and out with 3M Repair Tape
. I would drive it as necessary and not delay getting it replaced. Your biggest risk is probably a total failure if it gets hit by anything big driving.
We got hit by a big rock that crushed the windshield at the top with about a 1" smashed spot and cracks radiating for inches. Within a few miles they had propagated to one edge and were heading down the left side. We started working on getting it replaced within 24hours of the damage and it took us over a month to schedule an install. We drove to three parks during that period which was about 800 miles of driving.
I personal would schedule a replacement as soon as possible with a reputable RV installer who has done many windows like yours. You would be better off taking it to a shop where it can be done indoors. Indoors any rust or other repairs that need to be done to the surface where the windshield mounts to the coach can be performed. At a shop they can take the time to fix it right.
A good RV mobile glass install can come to you but if your coach has problems where it mounts you will only know this once the windshield is out. At that point you'll have to install the new windshield with only rudimentary repairs that can be done on the spot in a few minutes. The windshield can not be removed with out braking so you will not have a chance to get any rust fixed etc until the next windshield is installed. If there is damage to the mounting surface the mobile glass installer will probably not warranty the work.
2013 Winnebago Journey 36M DP. Full time since 2015. 1987 FJ60 Flat Towed, FAILING 2000W of GRAPE Solar
, 800AH LifeBlue
LiFePO4 batteries (excellent), SMI Toad Brakes.