WP + Woocommerce how to achieve 90 pagespeed?

Question

WordPress

(!) I want to note right away that I will be grateful for the answer to even more than one question, of which there are many.
I have a project under maintenance, I didn’t write it, I just finished it a little. The site is a typical small store (somewhere up to 500 products) on Woocommerce, WPML is used for multilingualism, Autooptimize is used for "optimization". Now, due to some problems, Google PageSpeed ​​gives out 30 on a mobile phone, 50 on a computer, but in general, if you clean everything up, you can achieve a stable 60-70. But I want all 90, tell me how this can be achieved?
- How to shorten the first rendering? I get a very heavy page, a lot of pictures, a lot of products are displayed on the main page - all these are database queries, how to overcome this. Use ajax and preloaders?
- Does it make sense, and is it possible to tie WebPack to wordpress? For example, for converting images to Webp or assembling files into modules. In general, as far as I understand, the functionality there is close to infinity and you can customize it for yourself (unlike these miracle plugins, in which I put a couple of checkmarks and everything "flies" - although correct about plugins if I'm wrong).
- If the webpack disappears, what can be done with the pictures? There is already a ready-made database of tens of thousands of images, they are all jpeg, is there any point in bothering with format changes? On the one hand, the pictures weigh a lot and this is bad, but on the other hand, the task is to adequately display on the retina display, what to do?
- Since everything will be rewritten from scratch, what other points should be paid attention to during development in order to achieve maximum performance?

Answer 1

Memcached, give a page from memory, and don't generate a new one every time + minify css/js, lazyload.
Change host, install OpenLiteSpeed ​​server, faster than apache out of the box

Answer 2

Heavy queries to the database can be solved by static caching (fastest cache/wp rocket). These plugins will have a bunch of useful extras. settings - gzip, minify html/css/js, etc.
The image will have to be compressed without quality loss - robin image optimizer, tinypng, gulp-imagemin
Other keys for Google - redis, cloudflare, openlitespeed, php-fpm