The phrase "afterwards begin" is not correct in standard written English.
It is typically used to indicate that something will start after a certain point in time, but the phrasing is awkward and not commonly used.
Example: "We will finish the meeting and afterwards begin the project discussion."
Alternatives: "then start" or "subsequently commence".
She published her first collection of poems in 1967 and soon afterwards began writing fiction.
I read for a degree in materials science and, afterwards, began working as a damp and timber surveyor.
His daughter received the vaccine in 2009 and in the months afterwards began showing symptoms of the sleep disorder, such as lethargy and sudden loss of muscle control.
Shortly afterwards began his lifelong career of 46 years of dedicated physician service at the Veteran's Administration Hospitals in Coatesville, Pittsburgh, and Phila, PA, Dublin, GA, and lastly in Montgomery, AL.
Afterwards begins the happy life, where God is satisfied with you, and eternal bliss "in the company of the prophets, the companions, the martyrs and the good people, who are all good company".
He returned to Cambridge and afterwards began a career in the church (though he was the exact opposite of a hell-fire preacher; I doubt if his God would have come up with the inferno).
It was one of the least affected banks during the global financial crisis, but afterwards began shrinking its investment business, executing layoffs and cutting costs.
Australia and Indonesia were the only nations in the world to recognise East Timor as a province of Indonesia, and soon afterwards began negotiations to divide resources found in the Timor Gap.
In 1893, Dunhill inherited his father's business and shortly afterwards began to supply accessories for motor cars under the name Dunhill's Motorities (a portmanteau of "motorist" and "priorities").
Dolz becomes infatuated with Díaz Varela and, shortly afterwards, they begin an intermittent sexual relationship.
