I'll repeat what Mete said...
If that's the only gun you have, you'll have to make due. Get a good GUN belt (not a flimsy belt from a department store), and a good IWB (Inside the Waistband) holster. In most cases, with that, a T-Shirt, or any kind of loose (untucked) shirt will conceal the gun very well.
Get training. Take a CCW course. Take a Defensive handgun course. Compete in IPSC or IDPA practical matches.
In addition, I recommend the Gun Digest Book on Concealed Carry by Massad Ayoob. It's a very informative book, and it should have answers to 90% of the questions you might have. You can get it on Amazon, and there is an eBook version of it.