While I have no knowledge of coding and as such I can't help on that front: don't spend all your time looking for people who can do the stuff you're bad at, start it, look for people then. You can and will get bogged down if you don't just jump straight into it.
If you have to do it yourself, you have to do it yourself, tough through it and you'll come out the end with another skill. Especially with art, it's really hard to make art that genuinely looks bad. A lot of the time even more simplistic art will come out looking more stylized then "bad" really. Art is very rarely so bad it ruins the game. It can be hard to tell the difference without looking through a lot of the more abstract games out there, like space funeral, which had very bizzare and kinda amateurish art, but it still managed to rake in a cult following, some areas of the more exploration related games out there like yume nikki and yume 2kki also get very amateurish in places, and yet they're known well enough for indie games.
Barring all this and you really just can't make the art or music or whatever work, there's free graphics libraries out there that look decent enough, dungeon crawl stone soup's tiles started with one of them, there's free music, you could probably pull something together just with those.
So yeah, don't hang around waiting for a team to pull together, because most people, understandably, aren't going to jump on a promise.