You can use the stamp duty calculator to figure out what your stamp duty liability may be. The first time buyer element of this calculator will only work correctly for values below £500,000. This is the current cap for first-time buyer stamp duty relief.
If you need financial advice and you live in the UK then you could contact the Money Advice service over the phone or via chat for impartial advice.
You can also contact the debt charity “Step Change” if you are in debt and need help.