OK, I'll give it a go. Short is always sweet in a major tld but, that said Who is going to want this combo in an .org ?. Letters combined with numbers are notoriously difficult to sell unless they are a combination of recognised short word with a single digit. Over the years I sold many a word number combo but, they have always been something like RED + single digit or a highly sought keyword like 'Smart' plus single number. These are just two random examples. All were .coms all sold in the one to two thousand dollar range
To sell something like hh2 in and org. First we are going to have to identify where that HH is going to find a home as an abbreviation, Not an easy task when we are basically looking at the 'Not for profit market' Secondly the number 2 has to add something to this identity. You've basically backed yourself into several corners with this one.
So where does that leave this domain. A short Personal identification maybe, somebody with the initials HH (maybe on his/her second marriage

) or the son or daughter of a parent with the same HH initials. I'm sorry to tell you the .org extension is the killer of this one.
Somebody may offer you a hundred dollars or two just for a short email address but that's about it. And that's the very best scenario. Uses do occasional pop-up for these type of combos, we have Have the High-speed rail link controversy here in the UK , also known as HS2