Am I getting this right as a US citizen?

I've read about 30 different threads now and almost feel more jumbled up than when I started. But from what I've gathered:

(as a U.S. citizen who files yearly but hasn't owed anything)

– Seems the only good investment option is buying a select few funds via IB Japan, and only through the NISA growth segment (SOL on tsumitate?), and then presumably a taxable (特定口座) once that is maxed.

– I only have Rakuten Securities now, but considering the above, is using it any further pointless? No hope they will ever comply with the necessary regulations to allow US citizens to invest pain-free?

– Before realizing how nightmarish it will be, I started iDeCo, and am already a few years in. It seems that while technically ok, there's a long list of forms that I need to file yearly, as the fund inside my iDeCo is almost certainly considered PFIC. I've read a lot of discussions here about it, but it seems that the consensus is that it is not exempt from reporting. But I have not been able to ascertain whether the best course of action (considering I already started) is to stop, or just deal with it and avoid any further PFIC.

Am I getting this all right? And how screwed am I?

Thanks for reading.