Short Version: Learn something. Your artistic Limits are your Style. It'll be a Start, and maybe your Vision will grow as your Work may draw People to join you.
Long and not so nice-sounding but well-intended Version:
This is a general Tip: Never be ~just~ a Designer. If "having an Idea" is all you can offer, that is literally what everybody else has as a basic human Function, and when it comes to turning Ideas into Games, I would guess that most People, having their own Ideas, prefer to turn their own Ideas into Games, not those of others. (If you do Teamwork with others, you should expect that they may, will and probably should also have some Design Input.)
But you say you could write, so there is the Possibility that you might be a good Writer, might have a good Grasp of good Narrative Methods, can create good and authentic Dialogues. But the Truth usually is that while Writing is not quite as basic a human Function as having Ideas, it is still a quite basic Thing which many People can and do use to write up their own little Stories, and they start to think that they are good Writers, and then they return a few Years later, take a Look at what they wrote, and realize how bad they actually were. I have made that Experience with my own Stories quite a few Times now. So, yes, we can write, that is not a big Deal, but it doesn't make us good Writers, and I just suggest you better be aware of that.
Since I do not know how good or bad your Writing Skills are, let's say they are good. That still means you need to write a Story, Characters, a World, which are so gripping to a few Individuals that they will be willing to sacrifice their Time for your Idea. And yes, a few, not a single one. If you find a single Person who can do all the Things necessary to make a Game, that Person will also be able to think and write, and will therefore prefer to work on a personal Project.
However, this brings us back to the first Notion: Never be ~just~ a Designer. Why? Because without a Team, a Designer is basically nothing. Maybe you can code, maybe you can make Music, maybe you can create Sounds. And maybe you can create Graphics. You may claim that you cannot, but that is Nonsense, we all can create Graphics and Sounds/Music somehow. But they may be bad. Maybe they are terrible. But well, your Limits define your Style. I wish I could paint better, and maybe I will, one Day, but so far, I shall be happy with what I have.
Take a Look at Daedalic's Game "Edna & Harvey: The Breakout". Those Graphics are ~terrible~! But it was the Start of a Company growing from one Guy to a few People to quite a Team now creating Adventures with beautiful Art, beautiful Music and... well, still not the best Writing, but they have grown, become bigger and more beutiful. but it had to start somewhere, and that Beginning was crude, simple, ugly. If you say you cannot do Art, you probably tried it and found it crude and ugly, but so what, maybe something good will come from it, and that will draw People to join you.