The 5th edition of Dungeons & Dragons is in the process of releasing, and you can download a starter set of rules of the player handbook as a free PDF and check it out! It’s 100 pages(!). How is 100 pages a ‘starter’?
The blurb states “…the Basic Rules for Dungeons & Dragons is a PDF (over 100 pages, in fact) that covers the core of the game. It runs from levels 1 to 20 and covers the cleric, fighter, rogue, and wizard, presenting what we view as the essential subclass for each. It also provides the dwarf, elf, halfling, and human as race options; in addition, the rules contain 120 spells, 5 backgrounds, and character sheets.”