I have purchased the transaction below with a large amount of Shiryo-Inu. However, I never received my token yet.
When swapping tokens for the first time, you have to approve it first to be spendable. And, that is what you did just now.
Since you are done approving the token, you need to enter the amount that you want to exchange then press the swap button.
All in all, you will confirm two transactions: approve and swap
NB: Both token approval and swapping transactions needs gas fees.
Read more: What is Token Approval?