Different Reiki attunements and which Reiki to start with?

There are so many Reiki I have read about like Kundalini Reiki, Usui Reiki, Dolphin Reiki, Dragon Reiki, Violet-Flmae Reiki.....list is endless.

•> What is the different between all these?
•> All these use the universal energy for healing, right?
•> If they all use the same energy source then where is the difference between all of them?
•> With which should I start with considering:
1. Have no experience working with energy.
2. I want to raise my Kundalini, so has Kundalini Reiki anything to do with it?
•> Do I have to complete master level on one Reiki type before starting another Reiki type?


♦> What does attunement do? Give energy to all the chakras? Open them? Or what?
♦> What is the difference between attunement for different Reiki types? How differently do they act on chakras?

You see I have a lot of questions regarding this....curious

Thank you

Thank you Divine Light for your prompt reply
How can I receive attunement?

And what about Kundalini Reiki?
Usui Reiki opens the top 4 chakras but Reiki Tummo opens all the chakras in the sushumna, is it true?

Divine Light....I wonder if you got my PM that I sent you couple of days back.I was waiting for you to reply.