How do I continue and divide the surd? And is there anything wrong with my steps?
A surd is considered simplified when it has a rational denominator and the "surd" parts have the smallest possible bases.
To rationalise a fraction with a denominator of $\displaystyle \displaystyle \begin{align*} a + \sqrt{b} \end{align*}$, multiply top and bottom by its conjugate $\displaystyle \displaystyle \begin{align*} a - \sqrt{b} \end{align*}$.