Fix Shopify Site - PageSpeed + Merchant Centre tags + Indexing

Description

Hi there!
I need some help with my new E-Commerce website.
They are minor things but can have a big effect on improving customer experience on my website.
There are 3 things that need fixing... each needs to be done thoroughly - and I know it's not as simple as installing a few plugins!
Tasks:
1. Increase the speed on both Mobile and Desktop - I already have speed plugins installed but they don't make much difference. From what I've read, I will need lazy loading coded into the liquid.theme file and lazyload all images, as well as the video on the homepage.
2. Merchant Center Product tags - Fixes needed to tags (G-TIN, SKU etc.) to make products show on Google.
3. Search Console Page Indexing - Fix canonical tags, broken links and any other issues preventing indexing of pages.
I will attach some screenshots so you can have more of an idea - Please only apply if you know 100% that you can fix these issues! Budget is low but looking for someone who knows how to do this at a top level as there will be more work needed on the website in the near future.
Begin with the word Zap to let me know you've read the requirements and understand fully what is needed for this job.
Many thanks,Richard