Your first mistake
Errors are normal. They are how you learn.
You will make mistakes. That is good.
Every programmer makes mistakes. Errors are not a sign that you are bad at this. They are Python's way of telling you something needs to be fixed. Learning to read errors is one of the most important skills in programming.
print("DNA)Notice the opening quotation mark before DNA. But there is no closing quotation mark. Python reads the line and gets confused. It does not know where the text ends.
Forgetting the closing quote is one of the most common first errors. Python will show a SyntaxError. The error panel will try to explain it in plain language.
When you see an error, do not panic. Read the message. Look at the line it mentions. Often the fix is small: a missing quote, a missing parenthesis, or a misspelled word.
What should you do when you see an error?