steps

Hi, I cooked up a plant and put it in some melted coconut oil. After 2 weeks it started smelling awful. Should I have kept it in the fridge or is this just how long it keeps for? I used to brew a lot of beer so took a few steps to make sure nothing nasty got in. But normal coconut oil...

I am a person who loves to cook and bake. I also want to learn how to make essential oils and lotions as well. I need ideas and suggestion, the know how's, the steps. I am still new at this adventure. I would really love some input and guidance.