I want to sell them, but don’t know if they are used for something
Some trinkets are used in hunts! Other trinkets will have uses later on but are mostly to sell right now.
The "What Should I Keep?" guide is a great way to see what's useful!
Who will win this staring contest? Place your bets now.
I'd just sell them for now. You can start saving trinkets for hunts when you have more money.
I keep about three hunts worth of trinkets from that what to keep thread and then sell the rest. Companions are a good thing to invest in.