As a course creator, you eventually have to choose between dozens of different tools.
There's something for all budgets. You can keep it simple and barebones or get all the bells and whistles.
Here's an overview of your options for each stage in your course:
Sell your course: Full-fledged LMS like Teachable, Kajabi, Podia, and Mighty Networks have landing page builders. Tools like Carrd or Unbounce work, too. And if you're just testing the waters, a plain Google Doc or Notion page will do.
Accept payments: If you're not using an LMS, services like Gumroad, Stripe, or PayPal are alternatives for processing payments.
Email students: Email is still the best way to keep your student informed. You can do that via ESPs like ConvertKit, or use the built-in email function in an LMS like Kajabi. If you have a small group, simply cc'ing your students in Gmail works, too.
Survey students: Run your onboarding and exit surveys via Google Forms for free or use the more fancy Typeform.
Schedule sessions: Create a separate Google Calendar for your course that you can share with students or use a tool like Luma. LMS Virtually has this functionality already built-in.
Host live sessions: With a Zoom Pro plan, you can host 100 participants per meeting.
Let students interact: Slack, Whatsapp, or Telegram groups are free and work for smaller cohorts. Circle, Discourse, and Mighty Networks are proper community forums for large groups.
Share material and recordings: LMS are perfect for that, but I've also seen Circle serve this purpose nicely.
If this seems overwhelming, pick something and get started. It's normal to outgrow your toolset and switch to the next option.