Yes, you can change the instance type of your Amazon EC2 instance. Here are the general steps to do so:
Stop the Instance: You need to stop your instance before changing its type. This will cause some downtime, so plan accordingly.
Change the Instance Type:
Open the Amazon EC2 console.
Select "Instances" from the navigation pane.
Choose the instance you want to change.
Click on "Actions," then "Instance Settings," and select "Change Instance Type."
Choose the new instance type from the list and apply the changes.
Start the Instance: After changing the instance type, start your instance again.
Keep in mind that you cannot change the instance type of a Spot Instance. Also, if your instance is part of an Auto Scaling group, you might need to suspend the scaling processes temporarily.
If you need more detailed instructions, you can refer to the AWS documentation.