I think it would depend on what exactly you want to hold bitshares for. You can sign up for an account with the bitshares exchange by clicking on the "online exchange" as shown in the picture below(if you have trouble finding it)https://bitshares.org
Or
You can use an alternative like Binance which lists Steem and BitShares. Biniance allows you to also have quick withdraws to your steem account which I like.
Many thanks, the less I have to use USD the better. Really appreciate your reply.