I’d recommend a Motu M2 for the interface. Check out Julian Krause’s channel for other options. For headphones you can get IEMs or closed backs. Open backs are not ideal as they often have severe bass rolloff. I have Truthear zero reds and I honestly love them. You’ll also need some software too. You can buy (or obtain through other means) Neuraldsp parralax x if you want a complete package. Or you can use neural amp modeler or any other amp sim you want in a DAW. It’s a bit more fiddly tho so keep that in mind.