Yeah thats great,i will be taking the diploma program too,its very good to take the disability studies if you really have the intention of
PR oneday as there are not enough competions in this field and above all in ALBERTA.
Since you have the Canadian visa, i dont see it difficult in getting the USA visa,probably you can wait a little bit then you try it out.
One more thing i wanna know,what are the documents you presented to the embassy for your visa, and how much have you paid already
in regards to the tuition fee.
How much was stated in your LOA as the tuition fee for the whole program. thanks