It does not sound like you have a distribution from a foreign trust. It sounds like you have "received certain gifts or bequests from a foreign person". In that case, unless other assets received in addition to your share of the home exceed $100,000 (US equivalent) then you don't have to file the Form 3520 at all.
If you do have other assets that total $100,000 inherited in the same year, then you will fill out the form indicating that you're filing an initial return, as an individual, and that you are a US person who received certain gifts or bequests (the bottom check box underneath line "C".) You would then follow with your name, address, and social security number on line 1 (a-h).
You would then skip to Part IV (line 54) on Page 6. Here you would list the date, description, and Fair Market Value ("FMV" on the form) of the proceeds from the sale of the home.
You then sign and date the bottom of the page. (Assuming you need to file it at all, which I am not convinced at this point you do.)
Hopefully, this will lift that sword of Damocles from over your head! Please reach out again if questions remain.
@dmlj
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