This
I don’t have studies and stuff, so take my words with a grain of salt. With that being said, I think you should try to read it in japanese and only start breaking stuff down when you know theres something in a sentence you’re not getting. If theres something you just dont get or need to break down, taking time to do so isn’t a bad idea. Otherwise if you can process it in japanese in your head, then do so.
I think with time you just get better at being honest with yourself and noticing when you really don’t understand something. If you catch yourself translating word by word in your head, don’t sweat it honestly. If you’re between N3 and N2 you’re kinda caught in the middle of that transitioning phase.
If I’m interpreting this right, you may have a bit of a misunderstanding. Personally, I never read something “as if” I could understand it. I always make sure I DO understand it, its just that some sentences can be understood naturally while some take some more effort when you’re earlier on in your studies.
It’s somehow way easier when there is plenty of kanji, because I can then just slide along words.
