Hi and welcome to Hubpages as a newbie! If you like to write, like the rest of us here, than your surely at home. To answer your question about a challenge you have posed upon yourself, is in a way like trying to guess where in a haystack, for example that needle is going to fall in. However if I was going to challenge myself, perhaps on a writing topic, or something else to blog about, I believe it would either be an autobiographical piece about myself, or challenge myself to how many blogs and/or articles I could write in lets say one month. These challenges by the way, do exist here on Hubpages. I would suggest challenge yourself first, by entering a contest here on hubpages, or trying to write a number of hubs within a months time frame. Hopefully I answered your question here somewhat. And that you found some useful feedback within my answer. Good luck.