Try the PhilZ recovery mate. Life will become easier. The latest CWM isn't working for me at all. I stumble upon numerous errors when using CWM. I will wait for a stable CWM.
There is one called Holo Reboot.
With the manual way, your do not need to press home button. Just press Power and Volume Up. When you see the blue writing on the top left corner, let go and it'll boot into CWM Recovery.
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Make sure you understand what you are doing, and there are some awesome guides here for beginners, read them. DO NOT forget to create a backup before you proceed. Download the official firmware for your model too, just in case something goes wrong...