Google cloud platform 谷歌云功能

我正在跟随谷歌教程创建一个简单的helloWorld函数并将其部署到谷歌云上。我的机器是Windows7-64位。 我正在关注这个链接：

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谷歌云功能目前处于Alpha状态，这意味着它只是一个白名单。您收到此错误是因为您的帐户未列入白名单。你需要注册Alpha，你可以使用它，Google云功能刚刚作为公测版发布。命令略有不同（例如，您不安装alpha组件）！它现在应该可以工作了，没有白名单

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这可能很愚蠢，但请确保在gcloud dashboard网站上的项目设置中启用云函数api

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在注册成为白名单后，是否需要一段时间才能访问Alpha，还是应该立即访问？

However I am facing few issues here:
1. Before You Begin -> Enable the API: getting the following error: "You have no permissions to use requested API"

2. Install the Cloud SDK: When I run the downloaded installer, following error comes: "Unzip failed: Error opening ZIP file"
I however installed SDK from another link:
https://cloud.google.com/sdk/downloads#versioned

3. Unable to install alpha component. Used this command:
gcloud components install alpha

4. Deploying the function: 
ERROR: (gcloud.alpha.functions.deploy) ResponseError: status=[403], code=[Forbid
den], message=[Cannot access Google Cloud Functions API in project gcf-project-1
]

If anybody knows the solution, please help.

Thanks,
Robin