I have this character idea but the magic is weird with it and I can’t figure it out [closed]

I am very new to D&D 5e. The whole idea behind the character is that they can manipulate metal decently almost telekeneticaly, like throw a knife and control it in the air or tangle the bad guy up with some chains. Only issue is that I can’t figure out how the magic system works nor can I figure out how to do this with a charcter. Is there something specific like an item to make this work or should I scrap the idea?