Page loading really slowly

Hello there, how are you?

I need help with my site, i just removed the pre-load animation (Placeholder), and it has a lot of delay when you charge another page.

-And another thing, can you tell me if it’s possible to center the logo icon in the nav more?

  • How can I edit the titles of the pages in the SEO?
  • Is there any main place to edit the fonts of the big titles?

-Lastly, I have one question, is it possible to upload SVG with more than 4.000 KB?

I am waiting for your response, thank you.