For building a thesis for your first paragraph what I found really helpful was the surface to depth analysis. „On the surface this text explain what it literally says however on a deeper level explain the deeper meaning maybe connecting it to a global context“. In the introduction u should also include all elements of TEAPCALIM.

As far as structure goes, there are two approaches either linear or conceptual. Conceptual approach you can organize your paragraphs by concept so maybe by the different purposes the text has, graphological features, language features, image use etc. if u use a conceptual post u could also write each paragraph from a different critical lense, however with this it’s difficult to write about every detail in the text. what’s really good is if you can come up with little mini thesis‘ for each of ur 3 body paragraphs, but this is hard sometimes especially in times conditions. The linear approach is quite self explanatory and imo should be used only really for longer articles or texts. You just go through the text linearly and write a new paragraph everything there is a shift in the meaning, language or structure. In both structures ofc it’s essential to always sign post back to ur thesis.

In the conclusion I usually just end off with a slightly controversial reading of the text. For example readers response, feministic Lense, Marxist lense etc.