If you feel more comfortable with gamemaker, you should use it. The tool that you know better is probably the one that will produce the best results. And gamemaker has many advanced features, it's a powerful engine. But it does rely on scripting. You won't go far with out using its native code, which does involve syntax.
I personally can't get to learn any programming language, I understand the basics but for the love of God, I can't remember any of the syntax. Every time I read or see something on a tutorial, I forget it in just a few seconds!
But C2 has a very intelligent way around syntax, it lets you connect logical pieces together and it produces the code for you. When stuff need to be written, most of the times the syntax is already there, just point to the object that you are interested to and access all of its available expressions. Then, point to the next object and link them together... No need to remember any syntax. And if you mistype something, the auto-correct system is intelligent enough to point you to your error.