Gonna Move to Japan October 2026 for Language school, Need some help!

I got enrolled in ISI Shinjuku for the October intake this year. I still am not sure about where I will live, what job I should get, and the general do's and don't's of Japan. I wanted to know what the best localities and neighborhoods are for international students to live in. I'd prefer to live near Shinjuku as it's close to my language school, but I've heard it's hella expensive to live there. What are some closer but cheaper alternatives for me to find places to live in? I definitely don't wanna live in a share house cuz i have heard there are a lot of rules and restrictions. Also, what kind of job should I look for that pays well? I'm 22M, and I have a bachelor's degree in aerospace engineering. I'm currently N3 level; however, I haven't cleared the level yet ( my exam is in 4 days!), but I can read 700+ kanji and can speak moderately as well. I was thinking of getting a job as an English tutor, but I'd like to find a job that can pay at least 1500 Yen/Hour Would love to hear y'all's suggestions