My son's birthday is coming and I was going to head over to Guitar Center this week and look at my option . . . but . . . you know . . . Corona . . . I never like the beer and I like the virus even less . . . I'm looking to get him a unit that will allow him to plug his bass or guitar into his iPhone, simulate amp/cabinet/effects, mix with music on his phone and listen with Bluetooth head phones. I know very little about this stuff and was going to rely on the sales personnel AND my ability to evaluate it in person. That's all down the drain. Can I get a little advice on what's readily available and works best?