You can set up a Skyp account and your first campaign in about 15 minutes. Alex did it on stage at SaaStr in 2025 in under 3 minutes (but he knew what he was doing!)
If you are running on Skyp Pro, you can send emails immediately.
If you are using Skyp Growth or Scale, you will need to wait ~1-2 weeks to start sending emails to give new email accounts time to warm up.
If you are bringing your own, existing and warm email accounts to Growth or Scale you can start emailing immediately after they are transfered to Skyp. Note that sometimes this can take longer than starting over.