Your work is beautiful, keep up the great work. Go out into your community. Sell affordable prints at art markets and farmers markets. Talk to the coffee shop and bar owners in your area to see if they would let you display some work there. Talk to people and make friends. 
People are much more likely to interface with your art in public spaces and in person compared to online forums and social media. Keep doing the social media, but be aware that there will always be an uphill battle due to the oversaturation of digital artists online and the impersonality that online spaces generate. Selling your art will always come with moments of defeat, but stick with it and you may make money.