Newbie Trying to Establish Basic Respect

as title suggests; i'm essentially an emergency teacher who stepped in for this middle school language arts class because their original teacher quit unexpectedly in October. i'm newer to the field, in fact this is kind of my first (very unexpected opportunity but i'm happy to take it for the experience). to give them credit, they're a lot better than they were in the beginning as far as basic respect goes and just letting me teach something. it's still totally an issue though.

it keeps getting to me i think. i find myself less positive overall and not as patient with the students. i want to create an environment optimal for learning and growth, but when i change the lesson plans at the drop of a hat to adapt to their unique needs, and print off extra resources they lost at home, and carefully explain my instructions/answer any questions they have about it, and put so so much effort into what i do- the fact that they'll stare blankly at me and say "ok but what are we supposed to do"- UGH! another thing that keeps happening every day is that students will straight up have conversations with other kids (even across the room at times) while i'm ACTIVELY instructing! no group work or anything, totally unprompted and after they've been reminded to be silent. it just feels so rude and disrespectful. i give out lunch detentions and they do nothing. i take points away in live school and it does nothing. i've genuinely asked a student before during detention if consequences were something they cared about at all and of course their answer was no.

i want to be better at this. i wish i had more guidance on how to separate myself from how they treat me/behave. some kids have even straight up told me they hate my guts in class! after i told them that they need to put their name on their paper ?? i know it's not personal logically. anyways ....

TLDR i would love some advice/guidance on how to not take student behaviors/resistance/noncompliance personally

(oh also doesn't help that i'm a much younger woman)