I think its better for them to learn to walk barefoot... at least that's what I've been told. I think those soft leather shoes are fabulous for tooling about indoors, and Owen used those for a long time. I bought his first pair of shoes when he was walking well enough for me to actually use that for his mobility. Funny though, it was like learning to walk again once he had those heavy sneakers on LOL. Be sure when you do decide to buy shoes you have him fitted and buy a good supporting shoe. He will get better at walking quickly now that he is walking. Fun stuff, I loved when Owen started walking (was right at 14m too!).
Good luck, and don't forget to baby proof your house again now that he is able to be mobile and reach things higher!

Zoey