Use www.google.com for straightforward questions like this.
https://www.google.com/search?q=why+usa+didnt+enter+wwi+at+first&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari
Why didn’t America get involved immediately in World War 1 ?
2 answers
We did not want German U boats to attack our schooners fishing on the banks. ( I may be a little biased on the subject )