Setup VPC Peering in same region & different region, if possible try cross-account vpc peering?

Certainly, I'd be happy to provide instructions on setting up VPC peering in various scenarios. This will give you good exposure to AWS networking concepts.

For VPC peering in the same region:

1. Navigate to the VPC service in the AWS Management Console
2. Select "Peering Connections" from the left menu
3. Click "Create Peering Connection"
4. Choose your requester VPC and the accepter VPC within the same region
5. Give the peering connection a name and create it
6. Accept the peering request (if you own both VPCs)
7. Update route tables in both VPCs to direct traffic to the peered VPC

For VPC peering in different regions:

1. Follow the same steps as above, but select a VPC in a different region for the accepter VPC
2. Ensure you have proper IAM permissions to work across regions
3. Update route tables in both VPCs, considering the cross-region aspect

For cross-account VPC peering:

1. Initiate the peering connection from the account owning the requester VPC
2. The owner of the accepter VPC must accept the peering request in their account
3. Both account owners need to update their respective VPC route tables

Key points to remember:

• VPC peering is non-transitive (if A peers with B and B peers with C, A and C are not automatically connected)
• Ensure CIDR ranges of the VPCs do not overlap
• Configure security groups and network ACLs to allow necessary traffic

By setting up these different peering scenarios, you'll gain practical experience with AWS networking, understand the nuances of cross-region and cross-account configurations, and learn about AWS's global infrastructure. This knowledge will be valuable for designing robust and secure network architectures in AWS.

Sources
Outbound routing from different regions | AWS re:Post
Cross account RDS access | AWS re:Post