With only 2 days and being your first trip, you'll have to prioritize what you will want to do. It just isn't possible to do everything (rides, shows, sightseeing, etc). Even after multiple trips spanning multiple years, we still manage to find new things.
1. Hagrids and Velocicoaster do not take EP, so you best bet is to go 30 minutes before rope drop to avoid long lines
2. Even with EP, you can get a lot done during EE. We typically go in early to a park to do rides in the morning (especially when it is hot), head back to the resort after lunch for a nap, and then hit the parks again
3. Visit Camp Jurassic in IOA (
https://orlandoinformer.com/universal/camp-jurassic/). We didn't find about about it until our 3rd year visiting, but now try and stop in on every trip. It is a fun play area for all ages and can be a great way to avoid the heat.