I’d start in A mode and change one setting at a time—aperture, then ISO/shutter—so you can see how each affects the photo. For landscapes or dim rooms, a tripod plus the 2-second self-timer helps reduce shake; check that the head’s load rating comfortably covers the camera and lens. I found a short checklist on best tripod useful for comparing tripod height, packed size, and head capacity to the kind of shooting you do.