I've never liked IWB holsters, they just never were comfortable to me.

I carry a full size (5") 1911 45 auto. I have several OWB holsters that work well for me; a 3 slot pancake works best, but I have others that work well too.

Just picked up an SD9VE and so far the only holster I have is the Blackhawk CQC Serpa. I am very pleased with this holster for now, but until I get more rounds through the SD to be comfortable, I'm not going to spend any more money on holsters for it. I have my sights on the DeSantis that is made for the SD series, but at $50, I'll wait a bit.

I'm always conscience of carrying my 1911, but unless someone is really looking, no one knows I'm carrying but me. And during summer/warm weather I only wear a t-shirt. White doesn't conceal as well as darker colors, you'll eventually find things that work for you, and you'll become more comfortable in the process.