For torrents, use well-known and reputable torrent sites. Even then, be aware of the considerations mentioned above.
They sat in the thick silence. Then, from the back room, the door swung open and an older woman emerged—Leo, sixty-two, a trans woman with a booming laugh and a rhinestone-studded cane. She’d been in the back, fixing the broken leg of a table.
From an ethical standpoint, consider the creators of the content. If you're accessing something like a talent show or a series, supporting the creators directly (if possible) or through legitimate channels helps ensure they can continue producing content.
To handle torrent files, you need a "client" that communicates with other users to download pieces of the file.