Well, I see you don't understand reflexive verbs very well😅 I'll explain it :)
Reflexive verbs are those whose action falls in the subject of the verb. So both the verb conjugation and the pronoun conjugation are the same.
You said "me pones", so that's not a reflexive verb, as "me" is in first person and "pones" is in third person.
The other one you mentioned, "me digo", is used as reflexive. That literally means "I tell to my self".
So basically, whenever something is done to yourself or oneself in general, you have to use the reflexive form of the verb (this just means that you have to use the reflexive pronouns). It might be difficult with some verbs, as some translations into English doesn't make sense, but I think you can easily get used to it and learn by heart which are the verbs that can be reflexive.
Here some examples:
-> Me peino (I brush my hair / Literally: I brush to myself)
-> Me lavo los dientes (I brush my teeth / Literally: I brush my teeth to myself)
In those two sentences "peinar" and "lavar" are used as reflexive, but you can perfectly brush someone else's hair, for example. In that case the verb won't be reflexive and you'll be using an indirect object.
-> Le peino (I brush her hair)
The direct object is omitted as the sentence would sound a little redundant, but if you want to say it it would be "el pelo" (the hair).
And lastly, reciprocal verbs are verbs whose action falls to both subjects. So the subjects do it to each other.
-> Ana y Pablo se quieren (Ana and Pablo love each other)
In English you need "each other", it's obligatory. But in Spanish, as we already have the reciprocal pronoun, it's not necessary. But anyway that would be translated as "el uno al otro" (that changes depending on the gender and person).
-> Se están mirando las unas a las otras (They (girls) are looking at each other)
Oh, and one last thing. "Devolverse" is not reflexive. I mean, you could technically use it as such, but it would mean that you're returning yourself to somewhere or something (as if you had been bought). That's a little weird😅
Well, hope this all is useful!