Sleeper: Please don't buy a set and please don't buy inexpensive tools. You really do get what you pay for. Can you clamp up something as a straight edge for the Dremel to follow?
What shape of a line do you want to see (V-shape, U-shape)?
Sets of any sort, there's one or more tools that you've paid for but will almost never use for whatever your carving style is. Cheap tools are cheap steel and you can't get them carving sharp or keep them that way.
Buy the one tool that you need from open stock. Henry Taylor, Drake, Two Cherries, Pfeil, Ashley Iles are some top brands. Some come carving sharp some don't. The edge may last 30 minutes then need to be honed. Much like putting a really good edge on a razor blade (can be done by hand).
Most of my conventional/western tools are Pfeil, made in Switzerland, lots of dealers all over the place.
They arrive carving sharp most of the time.
Best case scenario is to find a local wood carving club, meet those people and show them what you need to do.