Assuming you meant "too many different routes."
I really don't think there is such a thing as too many routes, or choices within reason. I would leave out small choices that won't really have any noticeable effect. If you're confident you can write all of it, I'd say go for as many paths as you like. I've just seen that a lot of times people will "bite off more than they can chew." If you start off throwing out all these different choices, and hatching all these different ideas you want to go back and write, the story will just keep growing, and your motivation has to be able to hang on through all of it. Someone else might be able to put it a bit more eloquently, but these CYOA's can get away from you a lot easier than a regular story from what I've seen.
My suggestion would be to take several major paths through to completion. All of the loops, dead ends, epilogues, etc. Make a finished product of it with only a handful of major paths. No dead links. Then if you're still motivated to write more for it there is nothing stopping you from adding more paths, and if you've lost the motivation to keep working on it at least you've already got it to a nice finished/playable state.
I think everyone wants to write a sprawling epic right off the bat, but more often I see it advised to start small, and work your way up to that. You might be one of those that could manage it, but I still think just taking a few major branches to completion first would be your best bet. Give you a real taste of what it takes to write a CYOA, and if you feel can handle it the option to add to it is still there.