The shahada is the door. Saying it sincerely, with belief in your heart, is the moment a person becomes a Muslim. There is no formal ceremony required, no test, no fee. Just truth.
You are now a Muslim. Welcome home.
The Prophet ﷺ said: "Whoever embraces Islam, his sins are wiped away — completely" (Sahih al-Bukhari 41). Your past is forgiven. There is no probation. There is no test.
Allah loves you. Your brothers and sisters are now praying for you. May He keep you firm.
"Say: O My servants who have transgressed against themselves, do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful." — Surah Az-Zumar 39:53