What is the AWS Free Tier, and how do I use it?

How do I check if I am exceeding the Free Tier limit?

How do I migrate from a NAT instance to a NAT gateway?

Here is a excellent information how to Migrate NAT instance (Unmanaged Service) to NAT Gateway (Managed Service)

AWS Free Digital Training

To start with AWS here are some of the digital training topics:

• Introduction to Machine Learning
• Introduction to Amazon GuardDuty
• Introduction to Amazon SageMaker
• Introduction to AWS IoT Device Management
• Introduction to AWS Fargate
• Introduction to AWS Greengrass

For more details: https://aws.amazon.com/blogs/aws/aws-training-certification-update-free-digital-training-certified-cloud-practitioner-exam/

AWS Certification Road Map

For more details: https://aws.amazon.com/certification/