Links:

Register your Business/Name

Canada – https://www.canada.ca/en/services/business/start/register-with-gov.html. 

U.S.A. – https://www.usa.gov/start-business

Payment Services

PayPal Canada – https://www.paypal.com/ca/webapps/mpp/home

Paypal U.S.A. –  https://www.paypal.com/us/webapps/mpp/home

Stripe – https://stripe.com/