Strudelicious, welcome to the site and community. Part of me wants to say sorry your running into such heavy competition already for KOF, but another part of me is happy your exposed to a large group of players who know how to play it and make you a better player sooner than you think.
A lot of players believe that this KOF isn't as reliant on tiers as a lot of other fighters, so a team of Takuma/Andy/Kensou/Duo Lon could easily work for a win. Duo will take more effort to optimize than others, but give him time and he'll pay back in dividends. Basically use whomever you like and know them inside out to get the win. And don't be discouraged by the # of losses; compared to many, you've got the tools to get more competitive wins due to your scene.
For a training regimen, at least an hour is recommended a day if you can spare it. 2 is more than enough. Definitely you can ask at this forum, in the KOF XIII section, about team placement.