Sis, i'm no pro but i'll share with you what i know from my experience so far..
When shooting potraits, you should try using M mode as this gives you greater flexibility in terms of controlling your exposure.. For me personally, i only use P mode to meter the ambient lighting..
Your shutter speed of 1/60 is too slow, hence abit of motion blur is apparent in your images (probably caused by either your movement, or vibration during shutter release).. Try using at least 1/125, this is the minimum you should use to freeze a frame.. As for your f-stop, you can try f5.6-f8 to get optimum sharpness for 3/4 - full body potraits.. And if you're using self-timer, use the mirror-lock function as well.. That's about all for sharpness..
If you have space, try to keep a further dist from the b/g as your shadows seem harsh (unless you don't mind that).. But since you're using window light, you might wanna look into using reflectors instead of your built-in flash as fill light.. That way, you won't get the harsh shadows.. And with rgds to your orangey lighting, check your white balance.. Try using tungsten/daylight white balance, or play ard with the built-in white balance settings to see which works best.. Or best still, shoot in RAW using AWB..
I have some experience shooting products and people in studio, so these are just my suggestions.. Feel free to post here or
our other thread if you have any issues.. All the best! :thumbsup: