This is when you need to research how Bitcoin transactions work, at least the basics and minimum technical info about "UTXO Model" should do.

Start with these articles:

• Read this: learnmeabitcoin.com/beginners/guide/transactions/#how-does-a-bitcoin-transaction-work
• Then, a little bit of this: learnmeabitcoin.com/technical/transaction/utxo

It should be spendable in Armory once your transaction gets confirmed.
It's been a day and mempools are almost empty, even if it has 1sat/vB fee rate, it should be confirmed by now. (search Blockexplorers if it's still unconfirmed)
If you still can't spend it even if it's confirmed, your Armory may not be synced properly.