What are your thoughts about LLM in IT law ? Can you do some entrepreneurship in that area later ? I would like to here something more about it.

What do you mean 'do some entrepreneurship?' 

IT law can be a good specialty. Lawyers in these fields tend to work in larger firms, often on IP issues / cases, but others work as consultants / legal roles for smaller businesses and startups. 

I suppose it depends on your career goals and what you are looking for in an LLM. If your law firm has a tech / IP practice, it might be a good first step to contact them and flesh out the opportunities and requirements.