[BeetleB]

If you've already done diff eq and calculus, you're ready for real analysis.

Abstract algebra has little prerequisites, so you can definitely do that. However, if calculus clicked with you, then you may find real analysis more to your liking. If you've done enough physics/engineering that requires calculus, you probably won't have trouble connecting the analysis material to your experience.

For me (engineering/physics), abstract algebra was ... abstract. It felt like a bunch of abstract ideas and structures that mathematicians invented to occupy themselves. Of course, that's not at all true in reality, but it was mostly irrelevant to my real world problems.

PS: If you've forgotten your calculus, don't worry - most real analysis courses/books start from scratch and don't assume prior knowledge.