Wix Dynamic Page

I have a Wix Website that @ 73 I have built myself based on my hobby collecting very highly detailed model vehicles. I have over 250 at the moment. Wix Web-sites have a maximum of 100 pages, however they also have what is called Dynamic pages. In my case I have 10 types of models so I now have only to use 10 Dynamic Pages and I can put as many of the models on each page without any restrictions. Sound very good, but I have struck problems in which will involve coding, something I am not good at. So I need some one who knows about Wix Dynamic Pages who can look at the issues. The main issues are (1) The video works fine. But there is no way to return to the page. A button is required or [coding?] (2) A second button to give access to a Image gallery does not work. [coding?] (3) It seems to be slow in loading [coging?] Apart from these problems the web-site works. I have kept the database simple to no more than 5 fields for all types of models to keep things as simple as possible. So I want someone to go in, look around and come up with simple solutions and get it working. There are other improvements that are needed so the person who does this job will be invited to do the other parts of my web-site.