Osaka does not need interpreting. It needs appetite and a plan for not wasting the middle of the day in covered shopping arcades that all sell the same snacks.
The city is Japan's kitchen in a way Tokyo is not. Okonomiyaki is a regional religion, kushikatsu has a no-double-dipping rule people actually enforce, and Kuromon at 8am is a working market rather than a food court. A guided crawl on the first night pays for itself by steering you into that, instead of the neon crab that everyone photographs and nobody from Osaka would queue for.
Where to spend your money
Book: one night food tour, baseball if the schedule cooperates, and Nara only if you will not otherwise get there.
Skip: generic castle tours, packed Kyoto day buses, and Universal unless you specifically want a theme-park day. USJ is not a cultural compromise — it is a full day gone.
The part nobody tells you
Dotonbori after 7pm is a carnival. Dotonbori at 10am is a cleaning crew and closed shutters. Do your serious eating at night, use mornings for Kuromon or Nara, and do not "see the Glico sign" as an activity. You will see it from every bridge.