A lot of people go to prison for lying to a federal officer.
Don’t not give statements always ask for your lawyer and always record.
The best way to shut a FBI agent down is to start recording them.
I don’t believe Trump will ever talk to them. You simply cannot take what he says literally. He was simply letting the public know that he is guilty of nothing.
Better yet, tell them that if they have questions, to submit them in writing to your attorney and that HE will get back to them. NO direct communication to the FBI, only letters from your attorney, mostly saying "my client tells me that, to the best of his recollection, X happened" or "my client does not recall". You can face perjury for lying to the FBI, but I'm not sure (I'm not a lawyer) whether a statement from your lawyer that he heard you say X, is similarly actionable.