Can I apply for diploma programs if degree programs are difficult to get admission in, and will that help with visa approval?

It depends. While diploma programs may have more flexible admission criteria and could be easier to get into than degree programs, choosing a diploma after already completing a Master's degree can raise concerns during your visa application.

Visa officers look for a logical academic progression. Applying for a diploma after a Master's might seem inconsistent and could affect your visa approval chances.

Given your background - including a Bachelor's, a recent Master's, and extensive work experience - pursuing another Master's is usually seen as a stronger, more coherent path for both admissions and visa approval.