Alright 1968, I'll try and explain how I go about it as simply as possible. Note, this is just how I do it (along with millions of others) so not saying its the absolute best way but it works.
First, you will need some type of "file transferring software" on your computer. I already had Limewire downloaded on my computer back when you used to could download songs off Limewire. While Limewire has technically been shut down, you can still download the software, you just can't search and download songs from Limewire itself (this will make more sense in just a second).
Second, go to the website
www.thepiratebay.org. Search whatever movie you want such as "J. Edgar" and several files will pop up. Look for ones that have a lot of seeders and leechers (which will be shown on the website as SE and LE). This just means that: 1. it will download more quickly because a lot of other people are available to download from, and 2. it's safer than others to download from because there wouldn't be a ton of seeders and leechers if it was a virus-infected file.
Third, while at piratebay, look for a file that has comments. Underneath the file info, people are allowed to post comments. If for some reason the file is not truly what it says, somebody will post that it is a "fake" so you can just move on or pick another file.
Note, if you're trying to download a TV series, its easy to search it as Sons of Anarchy s01e12, which stands for season 1, episode 12. Any time you see the user, "eztv" you can trust that user.
I know it sounds scary but I promise if you do your due diligence such as: 1. make sure there are quite a few seeders and leechers, 2. read the comments, it is safe. I have never gotten a virus because I don't download files that do not have comments.
Fourth, when you click on the link, "download this torrent", you will need to select from a list the software "Limewire". It will then begin to download in Limewire.
Finally, you will need to download a device to play the files. The one that works 99% of the time is "VLC media player".
Once downloaded, all you have to do is click the file and choose "locate file." Then, right click on the file and click open with VLC media player. If VLC media player doesn't show up, you can just select from a list of default programs, which is also an option.
This is the exact method I use and it works fine. I watch movies and tv shows. Every week, I download It's Always Sunny, Modern Family, The League, Sons of Anarchy, Boardwalk Empire, The Office, etc... and it works every time.