Every manga beginner makes the same mistake, and it isn't reading direction. It's starting with something enormous because the internet said it was essential. A thousand-chapter epic is a terrible first manga not because it's bad but because it's a commitment, and you don't propose on a first date.
Let's do this properly.
Pick by what you already love
Forget manga-famous for a second. What do you watch and read when nobody's judging? Crime thrillers? Romance? Sports documentaries? Manga has a deep bench in every single one, and your first series should sit in a genre where you already know you like the story shape, so the only new thing you're learning is the format.
A few starting points I'd actually defend: Fullmetal Alchemist if you want adventure with a real ending - it's the most reliably satisfying complete shonen run there is. Death Note if you want a thriller you'll finish in a week of late nights. Fruits Basket for romance-drama with more under the hood than its premise suggests. Yotsuba&! if you want to feel okay about the world for twenty minutes at a time. None of these need context, homework, or a wiki.
Our best manga by genre list goes deeper on every lane.
The right-to-left thing
Yes, manga reads right to left - pages, panels, speech bubbles, all of it. Yes, it feels wrong for exactly one chapter. No, you should not buy the old flipped editions to avoid it; they mirror the art and everyone in them becomes left-handed.

Top right corner, work left, drop a row, repeat. By volume two your eyes do it without you.
Decode the jargon (two minutes, then you're done)
Shonen, shojo, seinen, josei - these get thrown around like genres but they're really the demographic labels of the Japanese magazines a series originally ran in: young male, young female, adult male, adult female. They tell you about pacing and tone tendencies, nothing more. Half the people reading shonen are not, in fact, twelve-year-old boys. Read across the labels freely; everyone does.
The only other word you need on day one is tankobon - the collected volume, usually about 190 pages, which is the natural unit of manga reading. "I read three volumes" is how people measure, not chapters.
Where to actually read (free, officially)
Three options, in the order I'd try them. Publisher simulpub apps - free windows on current chapters, including many complete first arcs; this is the modern default and it's genuinely good. Your library - print shelves plus digital lending, completely free, absurdly underused. Subscription vaults - a few dollars monthly for huge back catalogs, the right move once you know you're staying.
The full breakdown of all three, including the regional catches, is in our reading guide. The short version: you can do your entire first year of manga without spending a cent, and nobody official minds.
How to not bounce off
Give a series one volume - that's the fair trial. If you're not curious by the end of volume one, leave without guilt; there is no canon you owe attendance. Keep two or three series going at different weights (one heavy, one light works well). And when something grabs you, ride it - the binge where you look up and it's 2 a.m. is the actual point of all this.
One honest warning: the first series that truly lands will ruin you a little. You'll chase that feeling through everything we publish on this site. Welcome - the reviews are spoiler-light for exactly that reason, and when you're ready to branch into Korean webtoons, the manhwa guide is next door.