
it really depends on the material, you can check the reviews since there are some occasions where the animation is well made so you can easily watch it first without reading the books. for me, i prefer watching since i can multitask lol. I often read the manga when i want to continue where the anime left off or to check some side stories

Watching anime first, then continue on manga where anime left off. I say this because sometimes the manga can be hard to read and the anime is what makes me want to stay. For example I don't like Cherry Magic or Demon Slayer manga. If I had started with the manga first, I wouldn't have been interested in the story at all. Aot is probably another good example. Those earlier arts were rough. If I didn't watch the anime and enjoyed the story, I probably wouldn't have ever been a fan of Aot.
I know this mostly depends on the story & is also something individual, since I've heard lots of different opinions - but as someone who's always confused about what to do and most of the time only ends up reading; would you recommend reading the manga version first or watching the anime first? no matter what, could be anything that has both.