Moving to japan – as a SWE

I am 26F software engineer, Asian, currently working in a Japanese IT company and I am thinking of transferring to the Japan office in Tokyo

The reason for the move is because
1. Currently I want to try to be independent and it’s hard to rent a place in my country

1. I heard it’s a good life experience to live abroad

2. I love the Japanese language and culture – I want to use the language more but it’s hard to find people to speak with in my country. Even with the use of apps, it lacks the physical aspect which is necessary I feel. Many people told me that it’s better to go to the country itself if I want to speak the language

I’m thinking of staying there long term, and in fact possible for life but I have many questions regarding living there

QUESTIONS

1. Community – for people who move there, how did you expand your community ?
2. Daily expense/ taxes – how much is required per month to live comfortably and still able to travel around? Also the rent there
3. Study- im thinking of studying there to expand my community and also to improve my career (if possible) but not sure if there are schemes there that allow me to work FT and study part time. Would also like to know the month cost of enrolling in such courses

Note: I have learnt the language for 6 years and have some Japanese friends and able to hold a casual japanese conversation.
I might not hold a JLPT cert but I’m able to speak the language
If required, I can aim for N2 if needed

Any other advice or opinions is welcomed 🙏