Before reading this article, I can give assurance that this will surely help you in downloading a torrent file. 

Alright, Now let us know
What is a Torrent?
A torrent is a file format that helps us to convert a large file to small. 
For Example: If you have 50 movies each of 1GB and you have to transfer it. This is a huge task. So, you can convert them into a torrent file and reduce the size of the movies in KBs(KiloBytes). 

How To Extract or Download a Torrent File.

1. Using Seedr
Seedr is a website that helps you to extract a torrent file upto 3 GB. Just paste the magnet link of the file or upload the file in this website. Then, you can easily download that file.

2. Using Apps
There are many apps to download torrent files but many people don't know how to use them. According to me TorrDroid, Bit Torrent and μTorrent are the best apps to download torrents. When you see a torrent on the internet, first download it or click the magnet link the if you open it that will be immediately redirected to the Torrent  Torrent apps and download will start automatically.

3. Using Telegram
Many people don't know about the 'Bots' available on Telegram. Bots are like applications that are easy to access and use. Now, If you have Telegram click here 👉 URL Uploader
Then, Start this bot and paste the magnet link in that bot. Within a few seconds, a download link will be generated. Click that link and then the download will start automatically.

That's it, I think this article helps you.
According to me using Seedr will be the best way to download Torrent files.