Yeah it is over exposed. Looks like still need to sit with my back against the light (window) and lower the ISO and not be lazy and start using a tripod.
Overexpose should mean that either exposure too long or aperture too wide or ISO too high, compensate any one of those will correct it. Aperture adjustment will affect the DOF (depth of field) thou, and the different can be very obvious especially shooting macro, so do put that into account. Sometimes composition also affect the exposure, especially harsh light, so do also see where the light source is coming from and how the subject is lit. Camera metering can sometime be fooled, especially matrix metering, thus spot or center-weight metering will come in handy in macro shooting.
IMHO, nothing wrong with this ISO setting as noise is not even a problem here. I think just change the angle of light source and put camera into slightly faster shutter speed (maybe half stop) will do, and with faster shutter speed the camera should be even easier to handheld actually.
