If you are running a one-man show then you should be focusing on one social media platform. For example for my website ReviewMyLink I am focusing on Reddit. I think that the majority of my audience are there. All I need to do is start a new community and be active on the website. Traffic will build up over time. Don't spread your effort all over the place. Focus on one platform and once you make it bring with you all the other platforms like for me I want to have a presence on Facebook and X. What about you? What is your business and what social platform are you focusing on?
It's like Alex Hormozi says if you're not making £1 million a year then it's "one product, one avatar, one channel." Reddit is a good choice for you because Google is basically in bed with Reddit. So you get a double whammy of Reddit traffic and Google traffic. For me it's YouTube. Just because it's the platform I grew up with and spent 99% of my teen years on.
Reddit's longstanding advice is: "It's perfectly fine to be a redditor with a website. It's not okay to be a website with a reddit account." There's a fine line when trying to drive traffic from Reddit. Once you cross it, you'll get shadowbanned or banned completely. I've never had any success with it.
Focusing on one platform is the right call when you're solo. I'd just treat it as the place you go deep on while still keeping a foothold somewhere you own. Reddit especially punishes spreading thin, since it can tell a real participant from someone drive-by posting the same thing across ten subs. The trap with going all-in on one is platform dependency. If your whole audience lives in a single Reddit account and a mod or an algorithm change wipes it, you're back to zero with nothing to show for the months you put in. What's kept me sane is treating the platform as the top of the funnel and moving people to something I own, usually an email list, as early as I can. Focus gets you the traction fast, and the owned list is the insurance that one ban can't wipe it out. That combination lets you go deep on one place without betting everything on someone else's rules.