To be fair, I found the best alternatives are just friends, and Twitter.
In Twitter you can follow people whose content you find useful. If you're a Blender user, for example, you can follow 5 Blender tech artists and your feed will be now full of cool tips and art.
With friends, with more or less the same skillset and hobbies as you have, you can ask them whatever you wanna ask. Heck, you'll learn a lot from them without even asking!
I'd just avoid using Reddit or forums to decide if I'm gonna use or buy something.
For example, if you ask what's the best OS on the internet, people will say Linux. Best DAW? Reaper. Best game engine? Godot. Best headphones? whatever is new and costs 100$ in Amazon.
Meanwhile, friends who make money and are in the industry and have businesses just prefer Windows, FL Studio and Unity. They aren't on the Reddit saying that the software or hardware they use - they just use them and make money. :)