WEBFLOW SITE CMS version Experts Only in webflow. - Migrate www.acumenfinance.com.au to www.acumenfinance.com / au

I would like someone to show me a creator but non-technical person how to upload newsletters on my website, then index them in google keeping consistent formatting, and get our SEO back on track. I also had a content creator write many articles for me. We run out of the webflow standard upto 100 Pages, Then had to upgrade to the CMS version, which caused us to lose a lot of rankings in google. Updating and uploading webpages from newsletters and indexing them in google. I had approximately 5 key words as number 1 at one stage around 15 months ago. This was because the site was run throught the back of Hubspot, which made the SEO party easy. I did it myself once shown. We then had to get out of Hubspot and put our main database back in Mailchimp as Hubspot pricing was too high. I believe the programmer who changed it to the CMS version didn't correctly map the H,1,2,3,4,5 tags nor the real key words we were chasing. The Current Domain is [login to view URL], but I also own the website [login to view URL] which is where I would like to have as the parent domain from this change. It would be helpful to create a video that steps through each of the processes, so it can be referred back to. Also for any future I.T Audit and understanding of billing.