You will find beginner threads about rooting - and Scotty has one that should go over the details. On another site is a Hansoon's all in one program which tries to make it even easier for people new to the HTC rezound.
Rooting is done as follows:
1. Unlock the bootloader by following instructions at htcdev.com I had great difficulty with htcdev.com and did it many times unsuccessfully. Turned out it did not like my registered email account. I tried many email accounts until it finally worked and emailed me the unlock.bin file.
2. Replace the stock recovery program with RA ramon recovery.
3. Boot into RA recovery and from the developer menu select the rooting option - very simple.
Phones come from HTC with S-ON. I think it stands for security-on. By turning security off, one has full access to the phone. The most practical of these is it is easier to flash kernels and also the capability to flash modified boot loader and also the radio firmware. With S-ON also comes increased risk of bricking the phone. One needs to always check the MD5 checksums of files one flashes, and also to be using the correct file for your device and firmware. One needs to be htcdev unlocked and rooted before even attempted the jBear S-OFF procedure.
I would not say it is more difficult to root compared to a Motorola phone, but there are more things to learn and be concerned about: S-OFF, kernels, radio firmware, unlocked bootloader.
I think Scott is dedicated to helping new people, and you will find more appropriate threads here to read and ask questions.
Regards,
Howard