Camera accessories for family photos?

Looking to buy a camera so I can take my own family photos and stop paying for others to take them. Thoughts on Nikon D3300 and what accessories are a must for photos of my family and my kids?

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My Nikon D7000 isn't shown when connected using Lightroom 5?

So i haven't used lightroom 5 in ages and never use to have problems with it, but for some reason my camera isn't showing up when using the tethered cable to connect it to my mac. This is a problem because i want to import photos from my camera and eventually export.

Thanks.

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My camera didn't come with a USB cable. Is it okay to use my phone USB cable or I have to buy a Nikon's cable?

The photos transferred without a problem using my phone USB cable.

Is it fine to use a cable that isn't from Nikon's?

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Can I use my Nikon D5100 batteries on my Nikon D5600?

Could there be any damage?

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