Probably the best thing to do is pick out a piece of hardware you have and write a review of it.
Read some of the reviews on the OCF frontpage, that is the writing quality and review quality that you'll need.
Do note that it takes a while, it's far from a free lunch. My average PSU review for instance takes 4-6 hours and is 3000-4000 words and 3-5 dozen pictures.
Average GPU review, excluding testing time (which is significant) is probably 3-4 hours for me, and another 3000-5000 words.
Longest so far was about 6000 or 7000 words, somewhere in there.
Shortest PSU review all time was "only" 2900 words.
So, start writing, post a thread with your review in it, and go from there.