The steps to learn calligraphy in "Miscellaneous Rivers and Lakes" are as follows:
1. Go to Nanyang Ferry: First, open the game map and set Nanyang Ferry as the destination.
2. Rest until dawn: After arriving at Nanyang Ferry, enter the local inn and select "Rest until dawn" to rest.
3. Qingshi Avenue Painting Stall: After the rest, go to Qingshi Avenue. Here you'll find a painting stall and a down-and-out painter.
4. Buy, sell and talk: First click on the painting stall, then select the "Buy and Buy" option, and then talk to the down-and-out painter.
5. Choose red copper: Open your backpack and select red copper, which is an item needed to learn calligraphy.
6. Use Snow Silver: Finally, use Snow Silver to interact with the Luolu Painter so that you can learn calligraphy skills from him.