A piece of advice that I can give for you is to improve your rank, so people tends to trust you more. You're a newbie, so there's people that don't want to trade, because you recently joined the community and didn't had participation enough. Another thing that also matters it's your Feedback score, because this might say if you're realiable or don't.
Before selling, it's important to engage with the community and it's people I reccomend reading the rules and some guides, especially the trading guides if you've questions.