You could look for manga on platforms like KissManga. However, keep in mind that not all the content there might be properly licensed. It's always best to support the creators by using legal and paid services when possible.
Well, there are a few options. Sometimes, authors or publishers release some chapters for free on their official websites or social media. Another possibility is to look for community-driven projects that share manga legally, but it might take some searching to find them.
Some popular options are MangaPark and Crunchyroll. Both offer a decent collection of English-translated manga. However, availability might vary depending on licensing and region.