How Do I Transition from Architecture to the Gaming Industry?

Architecture student here, graduating soon and thinking of switching into the gaming industry.

I'm looking into master's programs abroad and was wondering:

1. Which countries have the best gaming industry/job market?

2. What master's degree would you recommend for someone coming from architecture?

3. I'm currently interested in level design, environment design, and world-building. Does architecture translate well into these fields?

4. Is there good long-term career scope in gaming, or is the industry becoming too unstable/competitive?

Any advice from people working in the industry or who made a similar transition would be appreciated!