You can uses tools such as Wordpress for your website platform. MailChimp to collect email addresses. Clickfunnels to create funnels and landing pages that are completely automated. Stripe to process payments. These are just a few tools I use but there are many more options for each part of your business. Find the ones that work for you and help you create systems. (Disclaimer: I was not paid to mention any of these companies).
Most of us think of investment income as just the cash flow we get from bank interest, bonds, share dividends and property rents, some of which comes via a super pension.  But a more complete view is to also consider how growing the value of your investments can add to your spending potential.  This total return approach generates income from both income and growth to optimise spending from your portfolio across all market cycles, aligning cheap and expensive investments to your goals.