What's up, mate??? Feelin good?
In my case, Perfect to put it simply… "Hey, what's going on??" or "How's it going" are good greetings to cut into the conversation and ice breaks. 
And then, how do you often answer??? I was like" I'm good!" or "Hmmm, not so but" without second thought,  just because of my gut feeling. 
However, I found out that Australians often use "Perfect"!!!

That sounds great, right?  Then, Perfect!!
This word is also suitable to express my today's feeling as well. 
So today, I was so tough that I couldn't even have time to eat my lunch at all. I was satisfied with many tasks, including my main job teaching Japanese and setting my school devices, supervising children during lunch time blah blah blah. Additionally, I actively took another class as well for getting into Australian culture and improving English. 

But, I think all of the experiences are awesome even just talking with my students and there is nothing more than happiness given jobs as a member of my college teacher.  No matter what happens, I'm surrounded by staunch workers who are experts in dealing with some troubles and how to convert them into positive ways as well. 
It means I can try to do a ton of things as much as possible unless making mistakes again and again. 
Struggling as long as I have time not to miss out on opportunities while not being harsh. 

日本語

１つ言わせてください。なぜかChat GPTで今日の文章を日本語訳すると調子に乗っている口調の文章になってしまいます。訂正しようと思ったのですがこれもこれで面白いのでそのまま掲載します！！

どうだい、おい？調子はどうだい？俺の場合、シンプルに言うと完璧だな。「おい、どうだい？」や「最近、どうだい？」は、会話に入るのに良い挨拶だし、雰囲気を和ませるのにも良いね。それで、君はよくどう答えるの？俺は「元気だよ！」や「うーん、まあ」って感じで、直感的に答えているんだ。でもね、気づいたんだけど、オーストラリア人ってよく「パーフェクト」と使うんだよ！
それって素晴らしい感じじゃないか？だったら、パーフェクト！この言葉、今日の気分を表現するのにもぴったりだ。だって今日は、昼食を食べる時間さえ取る余裕がないほど忙しかった。日本語の授業を教えることや学校のデバイスの設定、昼食の時間時に生徒の監視など、たくさんの仕事に満足していた。さらに、オーストラリア文化に浸るためと英語力を向上させるために、積極的に別のクラスも受けていた。

でも、学生とのコミュニケーションを含む全ての経験は素晴らしいもので、大学の仲間として与えられる幸せな仕事は他にはないと思う。何があっても、トラブルに対処するエキスパートで、それをポジティブな方法に変換する方法を知っている仲間に囲まれているからね。それはつまり、何度も失敗しながらも、時間がある限り色々なことに挑戦できるってことさ。機会を逃さず、厳しくならずに時間を大切にして、奮闘し続けるんだ！！笑

Polished version 

Hey there, mate! How's it going? Feeling good? For me, it's perfect, to put it simply. "Hey, what's going on?" or "How's it going" are great greetings to jump into a conversation and break the ice. And when it comes to responding, I typically go with "I'm good!" or "Hmm, not so bad," just based on my gut feeling without much second thought. Interestingly, I've noticed Australians often use "Perfect!"

Isn't that fantastic? So, perfect! This word also perfectly describes my feelings today. It was a challenging day, so much so that I didn't even have time to eat my lunch. I found satisfaction in various tasks, from my main job teaching Japanese and setting up school devices to supervising children during lunchtime and more. On top of that, I actively engaged in another class to immerse myself in Australian culture and enhance my English skills.

All these experiences, even just chatting with my students, are awesome. There's nothing more fulfilling than the happiness derived from being a member of the teaching faculty. No matter what comes my way, I'm surrounded by dedicated colleagues who excel in handling challenges and know how to turn them into positive outcomes. It means I can explore a plethora of things as much as possible, learning from mistakes and persevering. I'll keep striving as long as there's time, seizing opportunities without being too harsh on myself.