Let's go over some of the goods and bands of starting with a standard barbell. It is nice that the plate will also fit on the standard dumbbells and you can load them up with quite a bit of weight. Just not the same amount of weight as something like a power bar or olympic bar. They are most likely not going to work in a power rack as well.
Overall they aren't a bad place to start as they are going to be cheaper but don't be surprised if you end up out growing them and needing something like a power bar. That would probably be why I would recommend starting with a power bar so you don't get a bunch of these bars and plates an in a couple of years down the line needing to replace everything.
