I hate spam as much as you do! When you sign up to join my mailing list, I will never sell or re-distribute your email address or contact information.
When you make any purchases through my site, you will be on a secure payment platform (Paypal).
If you call me and I process your payment over the phone, I use Square (also secure).
If you are in Canada and arrange to pay for any services, courses or products by e-transfer, I have auto-deposit which is secure, bank to bank. (e-transfer from the US to a Canadian bank still isn't available.)