Tokyo-takayama-shirakawa-osaka

Hi Jrpass expert,

I am making my 1st trip to japan from 15 Mar to 30mar and the draft itinerary is as follow:

15 mar: arrive at narita airport and stay in Tokyo
16~18 Mar: tour in tokyo and stay in tour
19 mar: day trip to hakone and stay in Tokyo
20mar: from tokyo to takayama then shirakawa and stay in takayama
21 Mar: ????
22 Mar: visit Nagoya on the way to Osaka and stay in Osaka
23 Mar: day trip to miyajima from osaka (stay in Osaka)
24 Mar: day trip to Nara (stay in Osaka)
25 Mar : tour Osaka (stay in Osaka)
26 Mar: day tour to Himeji (stay in Osaka)
27 Mar: from osaka to Kyoto and stay in Osaka/Kyoto
28~30 Mar: tour Kyoto and stay in Osaka/Kyoto
30mar: to Kansai airport

It is my first time to japan and I will appreciate some advice about the planning.

Do you think this plan is ok? Also, may you suggest a place for 21 Mar?

Do you think should I get a 7 day or a 14 day JR pass? And may you suggest when will be the best day to activate the pass?

To stay in Kyoto is too expensive. Do u advise doing trips from osaka to Kyoto or staying in Kyoto?
Do you mind helping me analysing cost of staying in Osaka v.s. Kyoto for the whole trip? I would guess, it is a 7days v.s. 14 days pass price??

Is a combination of other passes needed?

Thank you very much for your help.