Well website (WordPress) page speed and load depends on many things.
- MySql Queries
- Image optimisation
- Css files (more cs files more page load and page speed time).
- Javascript files ( more js files more page load and page speed time).
- Defer parsing of JavaScript
- Minify JavaScript
- Minify CSS
- Enable gzip compression
- Leverage browser caching
- Minimize request size
And much more.
Test your website with https://gtmetrix.com and start fixing issues as the websites presents to you. For this you will need to put your local server online with ip.
Page speed and page load need a lot of attention and it is a process not a single issue.