What do you think is amateur about this? She’s positioned herself as a whistleblower via a process for which she has to produce actual evidence of her claim, and convince a High Court judge to take it seriously. She appears to have done that, so her claims immediately have met an initial credibility hurdle, even if not yet proved.
She has spoken to the FT (serious newspaper with impeccable reputation) and is speaking on tv on a Sunday morning show generally seen as serious.
So far, she’s completely avoided the tabloids and the populist commentariat. Given this is all, at heart so far “he said, she said” I’m not sure what she could have done differently to position herself as a credible complainant. (Doesn’t mean she’s right of course!).