JRPass: is it worth it?

Hye.. I am planning to travel solo to Japan, early Nov. Here is my original plan.

Will land at Chubu, Nagoya, on 31st Oct.
1st - 3rd Nov: stay and exploring Kyoto and Nara (look forward to explore the autumn in Japan)
3rd - 5th Nov : Osaka
5th - 7th : Kanazawa
7th - 9th : Mt Fuji (Kawaguchiko / oshino)
9th - 11th : Tokyo Disneyland
11 - 13th: Tokyo
13th / 14th: fly to Seoul.

Can you please advise me on my itinerary as a whole picture? This will be going to be my first time travelling solo, and first time i visit Japan as well. I am trying to cut down the budget on transportation, if possible. Do you think i should apply for JRPass?

Thanks in advance on taking your time :)

Anne.