Welcome to AA!
A couple of days is nothing in bird time. Your conure is actually pretty confident if he's already approaching you. It's normal for them to be nervous of strange humans but taking food from your hands is a big step!
Keep offering food from your hands and showing that your hands are nothing to be scared of. Don't try to grab your bird, chase him or push him to step up before he's ready. You may be offering food from your hands for a while - days, weeks, even months if he's very nervous. Just take it at his pace and let him guide you in how you interact. He may ask you for headscratches by bowing his head, or hop up on your hand to better get some food. It all depends on him. It may take time but birds are long-lived - you have time, and it's worth going slowly and gently while you build up a friendship with him.
You can hang out by his cage to get him used to your presence. You can read out loud to him, or just talk softly to him or sing to him. Again, keep things hands-off until he initiates contact with you.
It's very important to lay a good foundation of respect and trust at this stage, and you do so by being patient, gentle and consistent. Show him that you are someone to be trusted, and will be a good member of his flock.