23M Seeking advice on moving to Japan after uni in 2-3 years

Hello everyone!

I am a 23M and I have 1.5 years of my Marketing Degree remaining (+1 year of obligatory army service). After that I would like to move Japan and work there for 2 years.

My CV is:

1. Three years Marketing experience (Social Media, Content creation, PR, website design, event management and promotion) through intenrships, startups, personal endeavors etc.
2. N5 japanese and hoping for N3 by 2028 (end of military service -).
3. In a japanese startup
4. Good recommendations for work that I cannot get in more detail
5. European Passport

I have studied abraod in Japan and know my fair share of the positive and negative of living there - I am not blind to that thus the 2 years. Yet I would love to go back to the country and live a small part of my life there. Maybe I could see myself living there for longer but with the visa restirctions and life in general who knows honestly.

I do have some questions and please excuse me for that:

1. How realistic is it for someone with my background to find a marketing position in Japan, either in English-speaking environments or at Japanese companies/agencies?
2. Would my skills be considered valuable in the Japanese job market, particularly for international companies, startups, or smaller marketing agencies?
3. How difficult is it to find a company willing to sponsor a work visa?
4. If I obtain a work visa and later want to stay longer than my initial plan, how straightforward is the renewal process?

If you have anything else you'd like to tell me to consider please feel free to share! Thank you in advance for your replies!