I am, I am, I am...

Как можно переписать подобного рода предложение:

I'm 30 years old, I'm from Ethiopia, I'm President of USA, I'm looking for penpals...

Нельзя же просто так выкинуть глагол to be?
I'm 30 years old, living Ethiopia, working President of USA, looking for penpals...

По-русски можно было бы написать как-то так:
Мне 30 лет, родился и живу в Эфиопии, работаю президентом США и ищу друзей по переписке..

Т.е. без постоянного повторения "I am"
Какое правило можно почитать на тему построение подобных предложений?
Явно у меня здесь большой пробел

It's perfectly okay. Just don't overdo it. It can look like shorthand writing. Connecting the phrases with conjunctions is the easiest way to make it less repetitive. To be honest, I can't really think of a short, normal sounding way to use that many self describing sentences next to eachother. I guess you just have to expand the writing more. All depends on the formality. I'm 30 years old, living in Ethiopia. I'm President of USA, and I'm looking for penpals... Maybe rephrase to use "I'd..."

I'm 30 years old, living in Ethiopia. I'm President of USA and I'd like to find penpals...
It look better, thanks!