Many holsters will work. I find a 1911 easy to conceal and comfortable IWB . However IWB may or may not be comfortable to you. A good belt will help carry the load of a full pistol. One suggestion I have would be find a holster with a sweat shield if you go the IWB route.
Personally I use a Gould and Goodrich IWB like this.
Gould & Goodrich | 810 Inside Pants Holster