Not exactly the same. The animation version of Jinx might have alterations in her abilities, backstory, or interactions with other characters compared to the DC Comics version. These changes could be for narrative purposes or to engage the audience differently.
I don't know of any legal place to read Jinx manga for free. Unofficial free sources can be risky and may not provide good quality. It's worth investing in a subscription to a legitimate service to enjoy the manga properly.
I'm not sure about legal places to read it for free. It's best to support the creators by using authorized platforms that might require a subscription or purchase.
Well, it depends. Some apps offer free comics for a limited time or have a selection of free titles. Comixology and Manga Rock are examples, but be cautious of ads and potential copyright issues.