Need a little guidance on going partially off grid [View all]

Hello all. So mostly boomer here, I can figure out some computer stuff sometimes but I am never happy about it. (I will have to pay someone to set up ). I am about to retire in a couple of years. also I plan on doing a couple of months of Rv'ing every year. Here is what I WANT to do I want to do everything minimal like a flip phone for calls no internet. I will use a separate gps only device for the Rv.
I was thinking about getting a iPad that was capable of mobile internet like a smart phone so it could all be contained in one device. Then at the same time it is mobile where the rv went. I then want to cancel all old email accounts and all associated accounts get a new one and basically disappear. I dont want any tracking I dont want any email from political orgs or Facebook of any social media. no advertising. I just want to pay a monthly fee to one provider source and a VPN (? ) Basically I just want to be way off in the background with no advertising coming in no targeted ads. I would like to watch you tube, check In here. I also want to talk to my wife on FaceTime while on the road. But not have to change anything when I am home. The most important thing is no ads interrupting anything. I dont want anyone (corporate world) to know I exist.
The other thing is once set up I will never upgrade or change anything just pay the bill till I am gone. Is this fantasy even possible ? Thank you so much in advance and please describe what is needed as if I was 5