Easy way of doing it is making an account at https://openledger.io/
Make sure your header of the site looks like this:
If your header don't say switch to advanced then you need to click switch to basic
You will then get a page that looks like this:
You find your wallet for the currency you want to use and deposit to that.
Then use https://blocktrades.us/ to buy bitusd and send to your account.
Or you just send sbd to your account
If you run into any trouble let us know and we will be more then happy to help you out.