when i would draw traditional art and post it, i would use this app called camscanner. Basically, the app just works as an on-the-go print scanner. Usually used for documents, artists could plug their art into the app and it'll work just as it would with any documents.
I'd just recommend making sure your lineart isn't too light (like pencil or such) and making sure the paper isn't too thin whereas you can see what's on the other side.
It's been a while since i've used this method but in the event of none of the settings doing your art justice and leaving behind tiny specs everywhere, i would edit the scan in ibis paint x...
Here's the Tumblr post reblogged by another user that gave me the idea years ago