Hello! Hope this reply isn't too late.
1. How would i structure my essay, do i need a proper introduction and conclusion? am i have approx 3 body paragraphs each discussing a separate point??
Yes you'll need a proper intro and conclusion. There is no rule that you must use 3 body paragraphs and discuss 3 points though.
2. What am i trying to do?? As in, am i just comparing what's different and whats the same between the two forms and trying to explain the impact of this? (My teacher also said i should avoid writing like a table tennis match but i'm then not too sure what to do?)
Essentially yes - consider things like what's different/the same, why was the decision made (context of the time period etc), how is it different (even if something was kept the same, consider how the change from say, a play to a film, can impact the story), and of course zooming out to look at what it says about the broader historical/political/social/economic context of the time period.
3. Within my body paragraphs, how should i approach comparing the forms?
This is such a broad question haha - do you mean how should paragraphs be structured?
4. just ANYYY tips for better phrasing of sentences (i find mine can get quite long and confusing because i'm trying to say too much at the same time??)
Honestly a lot of lit students fall into the trap of trying to make their sentences sound very sophisticated to the point where it doesn't even sound like english anymore. Just keep in mind that you are marked on how effectively you can get your point across, not how well you can memorise a thesaurus. When I wrote practice essays, I generally look at each sentence and ask myself 'does this actually add anything new to my analysis or does it just echo a point I've already made?' - if it doesn't add anything new, I'd delete it.
Also with paragraphs there's no rule that you must put one idea in one paragraph - generally this results in paragraphs being incredibly long and difficult to read, and the main idea can often get lost.
All the best with your SAC!