A:Answer If you started your 3-months trial, you'll be billed at regular price after 3 months from the day you already started your trial, and at the same time, you already started your TIDAL Hi Fi Subscription. I think that covers all you need to know.
There's no need to pay more after only a month, because you have 3 months, Free Trial or the BestBuy very low price you started the Trial, and you'll continue enjoying the music; you started your subscription the day you started the trial; officially, you'll be paying after 3 months, if you don't cancel. So, you already started your subscription, if you started the trial, and don't plan to cancel.
Hope this helps!