Write your code in smartpy ide. In this link: https://smartpy.io/ide.com
Run the code and select a target.
In the output select tab "Deploy Michelson Contract" and the button with the same name.
Origination
You should be in this link https://smartpy.io/origination
Select a rpc node. You can see RPC nodes. Login with some wallet or smartpy and estimate the cost from rpc with the button. Finally deploy with the blue button "Deploy Contract".
Accept the Pre-Signature Information and sign with the wallet.
And wait for block confirmations for another deployment.