Better Master Program after BS software engineering [closed]

Hello this is Hassan Sheraz

I recently completed BSSE(Bachelor of Science in software engineering) now i want to do Master but I'm confused

• Which field is best.
• Which country would be suitable for me e.g living expenses, fee etc.

Background

• My final year project in bachelor was a recommendation system using Machine Learning and python. i won first prize in university based on the final year project.
• CGPA is 3.23. working on research paper.
• I wrote some articles too on machine learning and recommendation systems.

I'm interested in Master in Machine learning from Germany as their education is free but there are two problems.

1. Their process is very slow as I heard it will take about 1.5 years for visa processing.
2. Their mostly government universities offer MS data science I'm interested in this field too but my mathematics is not much strong.

suggestion required which field is best from these

1. Software testing
2. Cybersecurity
3. Network security
4. Data science
5. Machine learning

or any other.

Which country is best where study is free, less living expenses, good job opportunities and future.