If your still not sure, why dont you have a look at the cards on the internet or go into a shop and have a better look at them. I think you should be fine with the mermaids but please dont blame me if you're not happy with them lol!
If it helps, I'll give you an example of a few of the cards:
Make a Decision: "Feeling stuck or indecisive? Listen to your intuition and make a decision".
Wait: "Dont rush into action right now. Bide your time for better results."
Yes: "Your intuition is correct. Take action accordingly."
These are just a few of the cards. I wanted to tell you about alot more than 3 cards. They dont sound fluffy, but they may sound fluffy to some people. I dont think so though. If you like the Healing with the Angels I think you should love these.
I have the goddess deck too and they are my favourites but before I got the Goddesses favourite were the mermaids.
Let me know what you decide.
Geministar