Some verbs leave you hanging. Quemaba la cena is he was burning the dinner, and if you say just la cena quemaba the sentence feels incomplete: you are still waiting to hear what the dinner was burning.
la cena se quemaba (the dinner was burning)
The se wraps the sentence up, showing the action is not being done to anything else.
Word order is flexible here: la cena se quemaba or se quemaba la cena. Because the se tells you nobody else is involved, the position does not have to.
Spanish has no get in this sense, so it says I burn myself. Nobody imagines you are doing it on purpose.
The second version needs no se, because the sun burns plus me already tells you what it burns. The sentence is complete.
Me quema el sol works too. You cannot say "quemo en el sol", because then we are waiting to hear what you burn.
Cenar does not sound formal in Spanish the way to dine does in English. La cena is /la thena/ in Spain.
Lo rompo · Se rompe todo el tiempo · Se rompen todo el tiempo · Cenaba · Quemaba la cena · Él quemaba la cena · Usted quemaba la cena
The plural of este is estos, not "estes". That looks irregular until you see where the vowels come from.
El coche · Este coche · Los coches · Estos coches · Ese auto · Esos autos
And as before, pluck out the t to get that and those.
You will have to notice these verbs in the wild: the ones that want a se when their action is not directed at something else.
Cenaba alone carries four meanings: I, he, she, it and formal you, all of them either was dining or used to dine.
Esos se rompen todo el tiempo.