Itinerary check! 8 day trip to Nagoya, Shirakawa-go, Hakone, Mt. Fuji, Tokyo

Hello people of r/JapanTravel! So I’ll be travelling to Japan in mid-April and this is going to be my 2nd time going there but my first time as a solo traveller. On my first visit, I was able to go to Kansai region so for this trip I’ll be focusing on Central Japan to Tokyo area. Not really sure if my itinerary is doable so I might need a little help

April 11, Tuesday (Nagoya)
– Arrival at Chubu Centrair Intl Airport at around 1250H
– Hoping to finish at immigration, baggage claim, sim activation at around 1330H-1400H
– Take a quick late lunch at the airport before heading to my accommodation
– Check in at accommodation then prepare to head out at around 1700H to explore Nagoya city a little bit
– Grab dinner and go back to hostel to prepare for tomorrow’s trip

April 12, Wednesday (Takayama/Shirakawa-go)
– Wake up early at around 0600H
– Activate JR pass before heading out to Takayama
– Explore Shirakawa-go for the whole day
– Try hida beef somewhere between shirakawa-go and takayama

April 13, Thursday (Hakone)
– Check out early in the morning and head out to Hakone
– Leave baggage at hostel
– Hakone Open Air Museum (2 hours)
– Go back to hostel to check in
– Gotemba Premium Outlets (3 hours)
– Thinking what to add for this day. Considering Mishima Skywalk but I think it’s a little too far (my accommodation is near gora station btw)

April 14, Friday (Hakone day 2)
– Explore Hakone for the whole day
– Take Hakone Tozan cable car to Sounzan
– Explore Owakudani. Try the famous black eggs
– Take Hakone ropeway from Owakudani to Togendai and take the pirate ship cruise at Lake Ashi
– Visit the historic Hakone-jinja shrine
– Also thinking on what to add here if I’m going to finish up early
– Try the onsen in my accommodation during the evening

April 15, Saturday (Tokyo)
– Check out at accommodation and time to head out to Tokyo
– Leave baggage at Tokyo station and head out to Imperial Palace
– Explore nearby attractions (Roppongi, Tokyo Tower) (anything that I can add here??)
– Wait for sunset at Shibuya Sky. Quick snap at shibuya crossing and hachiko
– Go back to Tokyo station and have dinner at Ramen street
– Check in at accommodation (Ikebukuro) and settle down

April 16, Sunday (Mt. Fuji)
– Head out to Shimoyoshida Station and climb the hill for Chureito Pagoda
– Walk to Fujiyoshida Honcho Street, take pictures, grab some light snacks
– Return to Shimoyoshida Station and take a train to Kawaguchiko Station to take the red sightseeing bus
– Go to Kawaguchiko Music Forest Museum and Oishi park and any nearby attractions
– Return to Tokyo and explore Shinjuku/Harajuku

April 17, Monday (???)
– Contemplating on what to do on this day. Cannot decide if I should go to Ashikaga Flower park then a day trip to Nikko to witness Kegon Falls
– Or if I should go to Hitachi Seaside Park/Ibaraki prefecture
– Any suggestions on where to go so I can maximize my JR pass. I really want to go to a flower park since I won’t be able to witness the full bloom of cherry blossoms

April 18, Tuesday (Tokyo)
– Head out to Tsukiji Market first thing in the morning and go on a food trip
– Go to Teamlab Planets before lunch time
– Go to Ueno after lunch then Asakusa, Akihabara or anywhere to shop for stuff

April 19, Wednesday (Last day)
– Flight’s at 1315H on Narita Airport so I’m planning to go to the airport by 1000H

Additional questions:
– Is my itinerary doable or should I change any destinations?
– Should I buy a JR pass? I know that not all of my destinations will be covered by the pass so I also plan on getting an IC card for convenience. I just want to experience the shinkansen to save me some time somehow
– Any restaurants worth trying that are accessible with my itinerary?
– Are skirts above the knee advisable to wear during this time or should I not risk it and wear pants for the whole trip? Also, is 2 layers of clothing enough like a shirt and a jacket or do I need to prepare heattech and stuff

Thank you in advance for all the help!