docs: Update hot-design-getstarted-guide.md

[sasakrsmanovic]

Removed redundant text as it is either not useful or is doubled up.

Also specified more precisely which getting started they need to have gone through ahead of this one

GitHub Issue: closes #

PR Type:

What is the current behavior? 🤔

What is the new behavior? 🚀

PR Checklist ✅

Please check if your PR fulfills the following requirements:

• 📝 Commits must be following the Conventional Commits specification.
• 🧪 Added Runtime tests, UI tests, or a manual test sample for the changes have been added (for bug fixes / features) (if applicable)
• 📚 Docs have been added/updated which fit documentation template (for bug fixes / features)
• 🖼️ Validated PR Screenshots Compare Test Run results.
• ❗ Contains NO breaking changes

Other information ℹ️

[sasakrsmanovic]

@agneszitte - could I get a quick review here please?