>>3470424>>3470426>>3470428>>3470430Since there is no singular "good" shutter speed (which depends on aperture on ISO), you need to learn about how exposure works, and how not to rely on your meter too much since it can give you incorrect readings in low light. For for your first shot it seems like the exposure was good for what's outside, but not inside. You probably would have needed a much, much longer exposure. The second one seems okay with exposure, but with bad lighting. The third seems more correctly exposed than the last.
Another thing is to work on focus. Try to avoid shooting wide open (sometimes even the parts which are in focus can look soft), but if you must, make sure your focus is spot on.
Also it looks like you got your pictures scanned at walmart or walgreens or something; their scans are all outsourced to Fuji, and they're all really bad; the colors always look bad, and they are never ever sharp. A huge rip off, you're better off with Memphis Film Lab or The Darkroom.
Pic is Velvia 100 in super harsh daylight (from Memphis Film Lab)