**Problem Introduction:**
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I'm working on a faker e-banking system as a side project for practicing my SQL skills (which are super bad), and I'm now stuck at a point where I want to pull data from two tables but cannot do that with joins

So, basically I have a users table which looks like this:
[![enter image description here](https://i.stack.imgur.com/0BPlE.png)](https://i.stack.imgur.com/0BPlE.png)

And I have a transactions table which saves the sender id, receiver id, amount, and date. And it looks like this:   

[![enter image description here](https://i.stack.imgur.com/7pKtc.png)](https://i.stack.imgur.com/7pKtc.png)

What I want to achieve:
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Now, I want to create a query that extracts the data in the transactions table in a way such that if I specified an ID of n (somewhere in the query), I'd get all of the transactions that user with ID of n made in a way that it **displays the first name of both sender and receiver of all of theses transactions**.   

I've been doing a lot of joins/subquery stuff to extract that information but I really can't seem to find a solution.

I'm using PostgreSQL btw.

Notes:

1. Sender & Receiver are not the same person
2. I want to display the first name of both the sender & receiver