Pick one question the final card can answer
A Bitcoin wallet says a payment has been sent. Why might the recipient still see zero confirmations? Keep the carousel on that question; address fees or wallet security elsewhere if they are not needed for this explanation.
Give each card a distinct step
First show the wallet preparing and signing the transaction. Then show broadcast and explain that a node may hold an accepted, unconfirmed transaction in its mempool. A node's mempool is local; peers can have different views.
Show what counts as confirmation
Next show inclusion in a block on the active chain: this is the first confirmation. Additional blocks built on top increase the count. Avoid depicting a universal timer or a guaranteed inclusion order. The Bitcoin developer guide describes the transaction mechanism, and its payment-processing guide explains confirmation and double-spend risk.
End by answering the opening question
Broadcast means the transaction was shared; confirmed means it was included in a block on the active chain. That distinction should be legible on the last card without requiring the reader to guess what the previous graphics meant. If a card can be removed without losing a step, it probably duplicates another card.
