WordPress Course & E-commerce Upgrade, referral program -- 2

I already run a WordPress site with an active affiliate program and package-based sales. I now need help polishing the commercial side and launching a full course area while giving the whole site a light visual refresh.

E-commerce tweaks
• Update the existing package details so the offer reads clearly and looks consistent.
• Create and configure one brand-new package, wiring it into the current checkout and affiliate logic.

Course section
I have 35 short video lessons ready to upload. I want them presented in a clean, chaptered interface that lets users track their progress and automatically issues a branded certificate once all lessons are complete. If you prefer tools like LearnDash, LifterLMS, TutorLMS, or a comparable solution, let me know—flexibility is fine as long as the end result is intuitive for my students.

Design touch-ups
Across the site I’m after subtle graphic improvements—tighter spacing, refined icons, consistent colours and typography—nothing radical, just the polish that lifts the overall look.

Please share links to WordPress projects where you handled similar e-commerce edits, membership/course builds, or front-end clean-ups. A quick outline of the stack you’d use and an estimated timeline will help me choose the right fit.