So here's a confession for you all... 90% of the time when someone makes their spell/prayer/ritual rhyme, I think it sounds corny.
I know, I know. I'm sorry.
I mean, I would never point at someone's work directly and say to them, yeah, you tried, but that is so silly sounding - that's just rude, right? It's uncalled for. Still, I can't do it myself. I don't ever bother with making anything I write rhyme, and I can't remember the last time I incorporated something into a working which rhymed. It just doesn't do anything good for me.
Unfortunately there seems to be this idea floating around that you need to make things rhyme, because that's the only way to raise power. Which is flat out wrong. Yes, this might be a good technique for some people! I know lots of folks who like when things rhyme... it makes it easier to remember, and yes, the flow of it helps them build energy for the working. Awesome, if it's working for you, go for it. It doesn't work for me, though, and I know I'm not alone there. The rhyming usually takes me out of the right mindset for a working.
So, if you're new to witchcraft, just know that you don't have to work with rhymes, even if someone says that's the only way to do things... because it's really not. There's so many ways to raise power, and heck, you don't even need to include words at all in a ritual if you don't want. Find what works for you. If it's a rhyme? Great. If not? Don't worry, try something else.