Your work will be printed on out most in wonderful chroma maintained on the painting materials, because it is a high-end drawing paper made by Hahnemuhle company that the great Art Masters have used over 400 years.
Moreover, even if your data is smaller resolution than the standard of the ideal, it is printed out as such beautifully unlike the glossy paper.
Therefore, because being seemed to be difficult causes confusion, you may not apply as following way of the best file handling.
===== The Best Way Of Your File Handling =====
Resilution:
Effective real size of form: 257 x 182 mm / 300 ppi (Within)
Pixel Sizes: 2,150 x 3035 pixels (Within)
Color Space:
RGB Mode
ICC Color Profile:
Adobe RGB (1998)
File format when you save your image data:
Chose the JPEG, and save it by the highest fineness without compression.
The file generated in this process will become about roughly 2.3MB.