The Forgotten Realms are full of powerful factions vying for control, and for a time, each has had the upper hand. The Harpers. The Zhentarim. The Lords Alliance. The Order of the Gauntlet. The Emerald Enclave. I might be forgetting one or two.
There's a bunch of these things.
If none of those organizations can help you, consider Acquisitions Incorporated. Called "Faerün's Definitive Adventuring Brand" by ... well, by the company itself, they've been in operation for more than a decade, and it's mostly been fine. For them.
I should emphasize that it's been fine for them specifically. It's not always fine for the people who hire them, and it's definitely not fine for the people they're hired to rob
Truth is, though, when you're just starting out in the adventuring business, it might be nice to have a leg up. It can be a big help to have access to the powerful artifacts, expertise, and jobs that Acquisitions Incorporated has to offer a new franchise. Plus, there are always openings available.
Just try not to think about why.
A DUNGEONS & DRAGONS® accessory for characters of levels 1-6
For use with the fifth edition
Player's Handbook*, Monster Manual and Dungeon Master's Guide*