Career in indirect taxation

I have done my articleship from big 4 in assurance for two years in audit department, auditing mainly one listed company for the entire span of two years.

So, for a exposure in indirect taxation, I have done one year industrial training in an oil and gas company, where I had some exposure on VAT assessments.

Now after qualification, I want to grow my career only in indirect taxation, despite having a very small stint in my articleship period.

Can anyone help me as to how I should proceed for the same.

What all should I prepare for the interviews?

Thanks In advance