[Advice needed] Is it even possible to get our website to load in under 2 seconds?

So we are an art supplies retailer running on Magento 2.4.6. Have around 15,000 SKUs with a custom theme (not sure if it’s based on Luma or something else) and a bunch of plugins from different providers.

The url is: https://www.artlounge.in

Our challenge is that our website is slow as molasses. We’ve never really focused on performance before – despite wanting to – but are starting to now, so would love to get the opinion of the group on whether setting a target for our developers to have any page of the site load in under 2 seconds is reasonable?

This is because we have a lot of Parent products which need the listing of 100s of variants.
e.g.
https://www.artlounge.in/winsor-and-newton-galeria-acrylic-colour
or
https://www.artlounge.in/rgm-plus-line-painting-palette-knife

We run our servers on Cloudways (Digital Ocean Premium Servers with 16 GB RAM and 320GB Nvme Drive) and they claim to have Varnish Cache enabled which should have made things lightning fast but clearly something isn’t right.

Will be asking the developers to reevaluate the theme and make it as light and optimized as possible as well as remove any plugins or extensions that we aren’t using or are redundant due to new Magento features.

Given the experience of all the folks on here, do you think our ask of being able to load any of these complex pages in under 2 seconds is reasonable?

Any advice on how to go about it or guide my developers would be appreciated as well.