spatialcomputing.info

I've just joined this group. I experimented with AR many years ago when it was in its infancy. Now I want to get back to it but realize the tools and process has evolved considerably. I want to start by placing my flat artwork in various locations with some accompanying text, both indoors and outside. Can anyone point me to an updated primer or suggest applications to begin experimenting with. I have an iPhone, iPad, and iMac. I'd also like viewers to be able to access this AR in the simplest way. I've been checking out various apps but can't get a read on which might be a good place to start.

One small project I want to start with is to place a "brass plaque" I've created in Photoshop on a specific wall inside a specific building.

I'd appreciate any pointers for this re-newbie. Thx.