It's not too late to learn calligraphy in senior one. Just see if you are interested. Interest is the basic requirement for learning a skill well. If you are cornered or forced, don't learn. Learning calligraphy is also very popular now. Now the country treats calligraphy very well and has little competitiveness.
Nowadays, many people begin to learn their own specialties from the first year of high school. Why do some people start to learn from the first year of high school? Soon, many people will have to draw well and write well. On the one hand, it is interest, on the other hand, it is talent.