The challenge from any artist will be to earn revenue from their work. The usual method of doing this will be to use galleries to hold an exhibition whether it be a group or solo show.
This show (hopefully done annually) will eventually start earning revenue and act as a base for your income, supplementing this income with other projects and revenue earning methods.
One such method I have found is the use of websites which offer print on demand for buyers.
I will recommend Fine Art America : http://www.fineartamerica.com
Sign up is free and there is a free trial service which enables you to post your images (ensure they are high quality) for potential buyers. Behind the scenes to can set the price you wish to be paid for the use of your images. Buyers have choices ranging from art paper to canvas prints, framing options, and cards. They are currently introducing printing on other items such as phone cases. I highly suspect this trend will continue.
I recommend setting up a Pay Pal account have have the payments sent there. Note..to receive payments from Pay Pal you need a VISA card.
Note that you get paid for your images, and you will also recieve a commission on the framing etc that the buyer chooses.
Another important step to note is that your must MARKET this service to your followers. I use social media. I must admit that I have been rather delinquent at marketing it myself, but I have not lost out from having this option for my overseas followers, as I have found that shipping original artwork to be a challenge, and very expensive.
Again, I recommend the site.....trying it out won't hurt. It takes a while to build up the sales, but its worth the effort that you would have to put in.