Dear questioner,
Thank you for your important question.
May Allah, Most High, reward you for your desire to increase in knowledge.
The first step in this process is to show gratitude to Allah, Most High, for placing guidance in your heart. This is indeed an amazing blessing.
Then, You must repent to Allah, Most High, from earning and consuming prohibited wealth. Be certain to never fall into it again.
Remember that the Prophet (Allah bless him and give him peace) said, “The one who repents from sin is like the one who never sinned.” [Ibn Maja]
As for your consumption of Haram, seeking forgiveness from Allah, Most High will remove those effects along with other acts of worship. The Prophet (Allah bless him and give him peace) said: “Follow up a bad deed with a good deed for it will wipe the bad deed away.”
(Tirmidhi, al-Sunan)
As for your earning of Haram wealth;
If it was taken wrongfully from someone, then it must be returned.
If it was earned wrongfully, such as interest, its equivalent amount should be given in charity (sadaqa).
If the amount is large, then create a schedule that allows you to fulfill the amount slowly.
(Ibn Abidin, al-Hashiya)
Please see: How to get rid of haram money.
And Allah alone knows best,
[Ustadh] Omar Popal
Checked and Approved by Shaykh Faraz Rabbani