If you have no idea what you are doing it is time to hire an attorney which in this case should be a Canadian one. You also need to figure out if you are setting up a Canadian federal company or a provincial one. Many Canadian provinces may require your company to have resident directors etc.
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You need a lawyer licensed in the appropriate province of Canada. US law is unlikely to be a problem if I understand your question, but it wouldn't hurt to run the Canadian conclusions past a lawyer in the jurisdiction where the US LLC is registered and/or has its principal place of business.
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Of course you need to change the LLC documents. Then you need a local attorney in one of the Canada provinces, in addition to the one you should hire in the US. Generally, Us attorneys have correspondents in Canada. We have some. In brief, there is not enough space here to illustrate the proper steps to take to protect your interest in the US and in Canada. Best.
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