Hi MeteoricDragon, welcome to the forums.
You will need a copy of Unity 5.5 (currently), a code editor (e.g. MonoDevelop as bundled with Unity, but I prefer Visual Studio), a clone of the GitHub repository, and a good copy of the Daggerfall files. If you've already played any of the Daggerfall Unity builds from Live Builds
page successfully, then you can just point to those same game files.
shows the basics of cloning the repository in Windows and running the game. Just let us know if any problems encountered here and myself or someone else should be able to help.
From there, I'd recommend working through the Getting Started tutorial
for Daggerfall Tools for Unity. This lets you play with how the Unity side of things interfaces with the binary game files. After that, take a deep-dive through some of the gameplay and world generation systems to see how it all fits together at runtime.
If you're interested in creating mods, check out TheLacus' awesome modding tutorials
Please be aware the project may not need much additional help at this point in time. The current set of core developers is firing on all cylinders and making rapid progress. The Roadmap
is where you can see features already implemented and those coming up. We currently have 0.5, 0.6, 0.7 features all in development concurrently. Anything further out is a mostly dependent on what is being developed now.