That is awesome! I am glad you decided to give Steemit a try! It is a pretty awesome platform. In all honesty I don't really use DASH or hold much at all,
(I have my own reasons for this) I do still list it for donations because BTC fees are high right now.So I am not the best authority on DASH. As far as the anonymity goes, from what I know about it, I believe in order to use the "privatesend" feature you have to be running the DASH Core wallet (again I am not 100% on this) I think they achieve/claim "privacy" by having a built in mixing service. If you are interested in anonymity, I would suggest researching Monero, which uses ring signatures.
https://getmonero.org/home
As I said, this is just my opinion and basic knowledge about DASH because I rarely use it, but I know a lot of other people do.
If you want to know more check out the DASH website,whitepaper or poke around steemit for DASH posts. Hope this helped a bit! Thanks for following!