Where to start earning?
I tried selling things, but nobody is interested yet
You mentioned coins not specific coins,, since you are a newbie and what you are selling is not something the community is interested in, so you're best shot is the bounty campaign, I don't know how long you have been here in cryptocurrency and how deep your knowledge is.
Right now, the Telegram Mini application tool that gives airdrops to participants is another one, just be sure to pick the right one to work like Dogs.
This is just a recommendation, but it really depends on your decision because you are the one who will work to earn coins.