Have you been training at all yet? If not, your body may not be physiologically ready in only 6 weeks. If you go into it without the proper training and the time needed for that training, you are likely to injure yourself, so keep that in mind if you haven't been training yet (it can take at least a few months for your body to train and properly be ready to do a triathlon).
With that said, we don't have training plans for that, but Runners World and Active.com have some good resources that you may find helpful:
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