Who will give Rollercoacher a running start with a fantastic logo?

I hope you could help me to design a logo for my coaching & training business, Rollercoacher!
Preferably I’d like the name in or with the logo. The company name could be written in capitals only, if needed.

Other criteria are:
Simplicity
Positive
Friendly
Enthusiastic
Energy
Colorful (but it needs to be stylish too)
Also effective without color
Professional
Trustworthy
Logo might reflect an aspect of fun / creativity, but this is not necessary

Furthermore: scalability, recognition and balance

This logo will be used for all communication channels (eg Facebook, Instagram, Twitter, website, proposals, powerpoints), so I’d also like to have a version with a transparant background.

Background information:
Rollercoacher is a one-person business for coaching and training. I have just finished my education to become a registered coach. I help people with work related ‘challenges’: their personal development, to deal with conflicts at work, to communicate effectively, to reduce stress, negative self-image and work-life balance.
Initially the name Rollercoacher was meant as a joke. But the longer I thought about it, the more I realized this was the name for my business: the name is creative and witty. It fits my style as coach. Furthermore people will easily remember it. The (other) rational of this name is: life is a rollercoaster, with ups and downs. Rollercoacher can help to deal with this. Usually you exit a rollercoaster with a good feeling / relief like “I did it!” I’ll make sure my clients will have the same feeling when they finished their sessions at Rollercoacher.

Thank you so much for your help!