I wouldn't worry too much about having picked up an RSO (razor shaped object). Most of the people that have started in the past couple of years have been caught out. Myself included.
Whipped dog is your best bet, You'll get something that shaves, will hold an edge, and most important it'll shave right out of the box. Don't even bother to strop it.
My first was an el cheapo RSO, It actually had a use outside of shaving. Once I had a razor that could shave I used the RSO to learn the basics of honing on. That razor is now useless, but it taught me more than it's money's worth. I'm now happily buying cheap vintage blades from ebay, Honing, stropping and shaving with them. Without the RSO I think I would have ruined a few blades and gotten very frustrated.