Question

We use a reflexive verb when we are doing something to ourselves, not to someone else.

Answer 1

You need to use the indirect pronoun me to indicate myself at the end of the verb in infinitive.

Some examples for you.
lavarme la cara is wash my face,
Infinitive lavar
indirect pronoun to indicate myself me
lavar+me= lavarme

cepillarme los dientes is brush my teeth,
infinitive cepillar
indirect pronoun me
cepillar+me+cepillarme.

Ponerme los zapatos is put on my shoes
infinitive poner
indirect pronoun me
poner+me= ponerme.

These examples are in present tense.