Investing with a US citizenship

As the title suggests, I’m a dual citizen permanently living in Poland and want to start an investment portfolio for the long run (ie. Retirement) and initially wanted to buy out a couple US-ETFs as the backbone of my portfolio along with some blue chip stocks. However due to my IBKR account being international I’m not permitted to invest in US-ETFs and as an American citizen it’s not worth the headache to invest in EU-ETFs (I’ve heard of people registering their broker account to a trusted fami