I need help to decrease the wait time of my site.
Https://www.oreidomdf.com.br/
I have more than 100 categories and 900 products.
Using opencart 2.3.0.2 with Fastor theme.
But is very slow. (5 or more seconds - Time to First Byte )
Gtmatrix results

What could I do to make my site better?
Thank you all