How do I recharge my Oasis wallet?

Could you please elaborate on the process of recharging your Oasis wallet? I'm a bit unsure of the steps involved. Is there a specific platform or service that I need to use? Do I need to have a certain amount of cryptocurrency in order to make a recharge? And are there any fees associated with the process? I'd appreciate a detailed breakdown of the steps required to successfully recharge my Oasis wallet.