>>96818893
Yeah, OSE is just B/X rewritten and stripped of most of the explanatory text in favor of a "modern" reference-style layout. Honestly it's probably better at the table, but flavorlessly written compared to B/X and not nearly as good at teaching the game.

>What if I want to play a game with sword & sorcery themes
Then you have a few options. Hyperborea (formerly Astonishing Swordsmen and Sorcerers of Hyperborea, but the name was too much of a mouthful) is a heavier game, based on AD&D, but has a bunch of classes and this spiffing map for a setting.

Or, if you want a lighter and more loosey-goosey system you could try an LBB OD&D derivative. For your purposes the best would probably be Seven Voyages of Zylarthen; the aesthetic in the books isn't exactly Conan, because all the art was lifted from the same Edwardian(?) public-domain illustrator, but the rules work admirably well for sword & sorcery. There are a couple other OD&D clones you could try, like the relatively straight imitation Swords & Wizardry.

Be warned though, effectively any D&D derivative pretty much constrains you to play with the established classes. That's just a core element of how D&D works. So you may be disappointed either way, depending on exactly what it is you're after.