Nah. Wicked easy!
You will need your old drive and a SATA cable (Top Left Pic).
Slide the drive into it's bay and use whatever connectors your case uses.
Find a spare SATA power connection (Bottom pic) and plug it in where it goes.
Plug one end of the SATA cable into the drive (Top Right Pic).
Plug the other end into the motherboard (Mid Pic). It doesn't really matter which SATA port on the motherboard you plug it into.
All this with the power off of course!