Appreciate Disney recommendations

I haven't been to Disney in a long time and I'm going with my sister on a trip for just a few days (I'm in the area for a work conference so tagging on a few days to visit Disney). My conference ends at 1pm near the parks on a Wednesday and my sister should be arriving right around then. We're in the area from Wednesday at 1pm to Saturday morning (our flight is at 10am), so it's a pretty quick trip.

I had a few questions and would love suggestions

1. On that Wednesday we'll realistically not get to a park until after 2 (realistically prob 3 by the time we check into the hotel and get to the parks). Does it make sense to even go to a park from 3pm onward? Is it worth it? Disney doesn't have like half day tickets or anything, do they? What else would you recommend in the area?

2. We'll have two full days (a Thursday and a Friday). Are there specific parks you would recommend given we only have two full days? I know they're all fantastic, but not sure how to narrow it down.

3. Any hotels that have free shuttle service to the parks now? (I know many suspected it due to Covid). Or are Ubers/Lyfts pretty reasonable if you're at a hotel close to the parks?

4. What do you recommend in terms of getting into the most attractions?

Thank you!!