[解析]
Dear Mr Geller,
You can't imagine how overjoyed I am hearing about your plan!I'm more than glad to offer my advice for your reference.(点明书信目的)
As a big fan of Chinese calligraphy myself,I'll recommend it without hesitation because it's a natural combination of beauty,strength,history and technique. 【高分句型一】In order to learn it well,first and foremost,one may need to devote himself/ herself to long hours of practice.Second,signing up for a calligraphy course would be a wise choice,which would help her study in a systematic way.【高分句型二】Besides,it'd also be beneficial to study and imitate the works of famous calligraphers.(推荐内容及简要原因;并且提出切实可行的学习建议)
I do hope you'll find my advice helpful.Best wishes for her future study!(表达祝愿)
Yours,
Huang Xiaoming