Newbie redditor blues.. need advice for people trusting me.

I'm new to reddit, I stayed away from it for a long time due to me having a tendency to fall down rabbit holes that consume me and aren't great for my mental health. I just made my account recently to hunt for Labubu's at the advice of my best friend. 🥹🩷

Well the issue now is that no one seems to trust me because I'm new? I have purchased once through here already and the person was so kind and the transaction went super smoothly, but being so new I don't know how to have transactions show on my account?

I usually use eBay and Facebook, so this is all new to me here.

Do you guys have any tips on how to prove to sellers that I'm not some scammer? I'm genuinely so disheartened because I've lost two sales already to people with older accounts. ): I always pay g&s, I thought that that covered the seller if I are or anyone else tried to scam them? Can someone still scam you even if they paid with g&s?

Thank you for reading, just looking for help. 🥹🩷