Can someone give me some suggestions to my Norway itinerary?

This itinerary is not helpful because it does not tell what you plan to do at a location. And "explore" is very unconcrete.

D2 and 6: Why two times Flåm?
How do you plan to do D3?

Seems you underestimate the size and travel times in Norway.

Your ratio of traveling compared to experiencing is very high. Tip: read Getting around Norway to get a better feeling of what you plan to do.

You can use you time much better by dropping Geiranger and to fill with Hardanger area, e. g. Dronningstien hike and Sørfjord.

Backdrop 3: I see no causality in this.

I consider Bergen a very pretty place; be aware it is very touristy. And rainy. The Flamsbana train from Myrdal to Flam gives beautiful views looking down onto the fjord. The Naeroyfjord ferry trip between Gudvangen and Flam is extremely scenic. The mainline train route from Bergen to Myrdal isn't as scenic as the trip farther east, toward Oslo, but it's fine and is necessary to facilitate the first two experiences.

Gudvangen is on the south side of the Sognefjord; Geiranger is well to the north. That looks like a thorny connection, but I haven't researched the schedules. Rural buses in Norway typically do not run frequently at all.

I suspect that the best way from Gudvangen to Geiranger is on the Coastal Express boat (Havila or Hurtigruten) from Bergen to Alesund then the bus to Geiranger.

Thus you could re-order this as
Day 1 Fly into Alesund
Day 2 Alesund to Geiranger by ferry at 1000 (or bus)
Day 3 Geiranger, then bus back to Alesund for the boat late evening (the ferry is at 1600, arrive Alesund 1900), So you can do ferry one way, bus back.
Day 4 arrive Bergen mid Afternoon, rest of the day for Bergen
Day 5 5 am in Bergen, pm Bus or bus/train via Voss to Gudvangen
Day 6 Gudvangen to Oslo- ferry to Flam, train to Oslo via Myrdal
Day 7 Explore Oslo and homer

Thank you all for the advice. I will continue doing some research.