Which two flashes? Thinking about triggering, etc.
About anything you try will put out some light. However, there really is a little more to good lighting.
The first idea is a "large" light. Like a 40" umbrella or 40" softbox is large. A bare flash works, but what makes soft portrait light is a large light, up fairly close to appear even larger. The rough idea of appearing large is that its distance from subject should be near its physical diameter.... Like a four foot umbrella at four foot distance, that will be very soft light. Four feet size at ten feet is not nearly as soft. A link about soft:
Creating Soft Light from the Flash
Softboxes are very good, but they just don't mount on speedlights. You'd probably end up some dinky 8x12 inch softbox, which is larger than a bare flash, but simply is not large.
Umbrellas are great for mounting speedlights, zoomed to 24mm and located near the end of the umbrella shaft (to fill the umbrella size). Also very easy to disassemble and store. Umbrellas do suffer more room spill, but the quality is about size, and there's absolutely nothing wrong with umbrellas.
The basic idea of "lighting" is a main light, fairly close to be large, positioned about 30 to 45 degrees above and to one side of the subjects nose. This off camera position makes intentional shadows on the face, to show its curves and shape, etc. But even with a large soft light, it is still a bit harsh. So we use a fill light, typically located very near the lens axis (back at the camera), to exactly fill the shadows that the lens sees, without making a new set of shadows. A link about setup:
45 degree Portrait Lighting Setup
Then all that is left is the mounting and triggering. The most simple, yet highly satisfactory method is simple optical slave triggers. These might give trouble outdoors in sunshine, but they work great in the living room. All you have to trigger is the near one (probably fill light very near the camera), and its stronger flash triggers the rest.
See the sig link below, speedlight section, about some mounting ideas.