The basic ruleset for Dungeons and Dragons (5th Edition). I assume, since this is a gaming forum, that you have some level of familiarity with concepts like class and level, so I'll focus on the parts of the process that tabletop gaming might differ most significantly from video games.
Whether you're new to Dungeons and Dragons, or you've played with a character someone else created, this guide will help you make your first character. Even if you don't plan on playing Dungeons and Dragons as a tabletop game, several upcoming games like Solasta: Crown of the Magister and the long awaited Baldur's Gate 3 will likely use very similar character creation systems, as they are both based on (or adapted from) 5th Edition Dungeons and Dragons.
Although the process can be quite intimidating, here's how to make a Dungeons and Dragon's character in Fifth Edition. Getting into the game, however, requires that every player have a character.
Dungeons and Dragons has been the venerable, go-to for tabletop RPG beginners and veterans alike for years.