I've only just started using QGIS (done some things in ArcGIS before) and SAGA tools don't work. The results don't make sense, QGIS stops answering or there is a python error. Could it be that there is something wrong with the installation? Or do I need to learn some python to fix it?
What Saga function? What version of SAGA?
Probably something to do with projection and/or resolution. If you are using EPSG:4326 then you must use the resolution in degrees ie 0.0001
Degrees to meters