I'm not familiar with ambitious card either, but I'm hoping this can help.
- If you can get a card to the bottom of the deck, you can do a flourish called 'Erdnase Go Round'. And reveal the card that way. Little tip, you'll have to do a 1 1/2 spin on the bottom packet to make it work. Or you can do 1/2 a spin, but 1 1/2 looks
More impressive
- a simpler move would be doing a 'Deck Flip'. Again, card has to be at the bottom, 1 1/2 spins, or just half a spin.
- if your card is at the very top, you could use 'Meer' a one card flourish that uses only the top of the deck while you're holding the deck. But at one point, you do end up flipping the card over. You do end up returning it face down, but this sort of set-up can allow for another go at Ambitious Card.
- another one of the card is at the top is a new one called 'Rakurai'. Again, you're holding the deck, and you can throw the top card up and catch it with your mouth.
There's a myriad of false shuffles and 'displays' in which the top card of the deck will be easily accessible.
I hope this helps in some capacity