How to swap tokens in OKX wallet?

Excuse me, could you kindly elaborate on the process of swapping tokens within the OKX wallet? I'm quite interested in understanding the steps involved, from initiating the swap to confirming the transaction. Are there any prerequisites or fees that I should be aware of? Furthermore, could you clarify if the swap feature is available for all types of tokens within the wallet, or are there any restrictions? I'd appreciate your detailed guidance on this matter.