IME international funds are as easy to buy as any other, and tax rules are the same as long as the assets remain in a US account.
OTOH if you want to actually move your assets from a domestic account to one in Europe, you may face additional requirements for disclosure and annual reporting. But that’s not necessary if your goal is simply to diversify with international ETFs.
I already did.
How would you recommend going about selecting European ETFs? Are there any weird tax implications for a US citizen?
IME international funds are as easy to buy as any other, and tax rules are the same as long as the assets remain in a US account.
OTOH if you want to actually move your assets from a domestic account to one in Europe, you may face additional requirements for disclosure and annual reporting. But that’s not necessary if your goal is simply to diversify with international ETFs.
There are foreign ETFs where you can buy in USD if available. I don’t know how that affects taxation for US citizens.
FSEAX