First-time Solo Trip (Oct) - 13 Days Osaka, Hiroshima, Kyoto, Tokyo - Is it too ambitious?

Context:

• Vibe: 1^st timer, solo traveler, budget-focused (hostels/cheap hotels)
• Travel Dates: October 5th – October 18th
• Route: Osaka (3 days) - Hiroshima (1 day) - Kyoto (3 days) - Tokyo (5 days)

Proposed Route Summary:

• Osaka:
  • Day 1: Hozenji Yokocho, Shinsaibashi shopping street, Nipponbashi, Kuromon market, Sennichimae street, dotonbori, glico sign (This is a whole day plan)
  • Day 2: Osaka castle, Nakazakicho, Umeda Sky, Pokemon Center
  • Day 3: Day trip to Nara (Nara Park, todai-ji, nandaimon gate, nakatanidou, shitenno-ji) then back to Osaka (Namba yasaka jinja, shinsekai)Focus on Dotonbori, Shinsekai, and Osaka Castle
• Hiroshima/Himeji: Early transit from Osaka with a stop at Himeji Castle en route to Hiroshima Peace Memorial Park and Okonomimura.
• Kyoto:
  • Day 1: Morning in Miyajima (Itsukushima Jinja) before traveling to Kyoto for Higashiyama and Kiyomizu-dera in the afternoon.
  • Day 2: Fushimi Inari, Sanjusangendo, Kamo River and Pontocho Alley.
  • Day 3: Arashiyama Bamboo Forest, Kinkaku-ji, and Nijo Palace.
• Tokyo:
  • Day 1: Nishiki Market, meiji jingu, yoyogi park, takeshita park, shibuya crossing
  • Day 2: Senso-ji, Sumida River walk and park, Ueno park, Yanaka Ginza, Ameyoko market, Akihabara, Kanda Myoujin shrine
  • Day 3: Planned coastal day trip to Enoshima and Kamakura
  • Day 4: Tsukiji market, Ghibli Museum, Shimokitazawa
  • Final Day: Imperial palace and Asics run. Left open for shopping or a potential concert.

Questions:

1. Kyoto vs. Tokyo: I currently have 3 days in Kyoto and 5 in Tokyo. Should I move my Enoshima day trip day to Kyoto instead to give that city more breathing room?
2. The Enoshima Skip: If I skip Enoshima, is Kamakura alone worth the trip, or should I just focus on more time in Kyoto?
3. Logistics: As a solo budget traveler, does the sequence of Himeji - Hiroshima - Miyajima - Kyoto flow logically?
4. Missing Sights: Since I’m going in early October, are there any seasonal events I’m missing in these specific cities?
5. I do like anime and electronics, so are there any sights that I'm missing and I'd appreciate if you could mention when it would fit into my itinerary e.g. when to do Nakano broadway