You can reach the required stats and achievements to apply. Affiliate is being automatically granted to you upon applying. Twitch partner applications are all manually reviewed by Twitch staff and they look at various things such as your stream quality, appearance, language, chat activity, stats over multiple months and your other social media accounts and thus we are unable to guarantee that you will be accepted straight away if your stream does not satisfy Twitch, but we have hundreds of people who have achieved partner status over the period of a few months after using us.