If it's at night I can suggest some settings to try with your flash and your mode set to manual.
Of course it all depends on lighting and the power of the pop up flash (not very powerful), but I typically shoot photos like
this,
this and
this on these exact settings:
- 1/60th shutter speed
- ISO 1000
- f/5.0 aperture
- On a Canon 270EX external flash with diffuser card
Unfortunately the flash you're using isn't quite as "soft" but it's probably not as bright too so it could turn out similar.