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You need to use a coconut that has turned brown. The coconut is a seed, and like any seed, it needs to ripen before it can germinate. It's not ripe until the husk is brown.

It sounds like sooty mold, which is caused by fungus growing on the sticky substance (honeydew) exuded by insects such as aphids, scale, or whitefly. This is relatively easy to get rid of by controlling the insects. Neem oil helps with both. Read more here: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

These palms are the product of some major force, like wind or water, that has partially knocked over the plant. Most of the root structure remains connected, so the plant can continue to grow, although it's tilted, or even lying on ground. So if you want to force a plant to do this, you become the "major force." You can start with a plant that has some growth to it, and by shoveling the soil away from the roots on one side and under the roots on the other side, you can maybe push it over somewhat. Or you can plant a palm so that it is tipped at the angle you want. Or you can start with a young palm, and force it to grow tilted by staking, weighting, and tieing.

Can you identify or describe the insects? Can you describe what is happening to your tree? Answers to these questions will help me better assist you.

In the meantime, I can offer you a great article on the reasons coconut trees die, which will help you:
https://www.gardeningknowhow.com/edible/fruits/coconut/coconut-tree-problems.htm

I suspect that this is "stem bleeding" which is discussed in the following extension article:
https://bit.ly/1cX7ApH

Yes, you can grow one coconut tree. This article will help: https://www.gardeningknowhow.com/edible/fruits/coconut/growing-coconut-palm-trees.htm