want to know the budget after the free trail end

Hello.

It depends on the specs of EC2.
https://aws.amazon.com/ec2/pricing/on-demand/?nc1=h_ls

For example, if you are using t2.micro, it would be as follows.
I think it will cost around $100 per year.

0.0116USD * 24h * 30day * 12month = 100.224USD

EBS fees and communication costs should be included here.
https://aws.amazon.com/ebs/pricing/?nc1=h_ls

If you want more accurate pricing, we recommend using the AWS Pricing Calculator to calculate your costs.
https://calculator.aws/#/