I am very new to cake decorating. Recently started a course and loving it.
I have got all the gear and no idea! 
It is my daughter's birthday and I want to make something like this, but I would love to put this little swimmer on the top.
I only know how to do piped icing so far. I have had a practice; traced it on to wax paper and tried on my practice board with a plan to pipe it in gel and transfer the outline that way, then pipe it on with colours.
It looked awful.
Is it too fiddly, or do I just need to practice?
What would you do?
I would really appreciate any advice.