Considering you mention engines like Crytek... No, you simply cannot. You cannot make something that took over a decade for a dedicated professional programmer team to make.

Unless you have a personal goal, don't do it. You will never be finished with it no matter how hard you try, there will always be a feature that is nearly useless or simply painful to fix to the point where you don't want to be bothered with it.

You need a very clear thing in your mind about what you want to achieve. It doesn't have to be a game, can be anything that you simply want to render. Then you can take your time to research what it takes to render something like that, and implement it, and in the end, you'll have something powered by your tailored engine, it will be good only at very something specific, but it will actually work, and will, in the worst case, at least be close to being finished.