When do I pay taxes in Quebec Canada if I’m selling worldwide? I use Shopify I only made about 2k in Canada about over 50k worldwide. Should I collect GST/HST? And do I need to start income tax I am very confused on how that works. Explain like I’m 10

I also made a sale yesterday for the first time I collected HST 13% in Ontario but I didn't collect the money because I don't have a business number and it's stressing me out