What equipment and information do I need to connect to AWS from my office?

■What you want to do
Use AWS EC2 services to build one server on the cloud and send and receive files via HULFT with one server built on-premise in the office.

■ Current State Knowledge and Situation
Network knowledge is at beginner level. (Just looked it up online)
No actual construction experience.
Drawing a picture after considering a rough configuration to achieve it.

■What do you want to know
I didn't really understand what equipment and information I should prepare to accomplish the above.

AWS side
AWS probably has a configuration procedure to connect as a cloud service.
As I looked into it without knowing it, there are three main AWS network services, and this time I expect to adopt a "VPN connection.
I think it will be an image of creating a VPC and creating a VGW at that point of contact.
I don't think it's necessary to prepare equipment because it's a cloud, but what information should I prepare to set it up?
(Like having your company's system representative pay out the Global IP?)

Office side
The equipment and information to be prepared are unknown.
Do you need an L3 router with VPN server functionality as a point of contact?
Do you want a line that can access the existing Internet or do you need a separate line contract?
What is the configuration of the connection from the server or client in the office to the L3 router?
Do you need an L2 switch?
Need NAT Translation?

I apologize for the lack of unity, but I have no experience and my knowledge is fragmented.
I think some information is not enough to answer, so I would appreciate it if you could point it out.