@Holo awesome! Thats ~7M per day, the previous web project I worked on I optimized to 345M per day / 10B views per month on a m1.medium instance with complex queries :) I normally measure rps and latency but I dont think the site is doing complex queries. I referred to AWS because its a metric...
https://www.similarweb.com/website/mangadex.org#overview says about 40M page views per month = ~1.3M per day which is easily doable on micro AWS servers.
If using WordPress, caching can be a huge benefit!
Also what about a free tier CDN? Then could help alleviate bandwidth costs, though...