Let's go through the steps using the verb "afeitarse."
Step 1: REMOVE the Reflexive Ending: -se
The verb becomes "afeitar."
Step 2: REMOVE the Infinitive Ending:
The infinitive ending "-ar" is removed, leaving us with "afeit."
Step 3: ADD 1st person Ending:
For the 1st person singular (yo), we add the ending "-o."
So, we have "afeito."
Step 4: ADD the appropriate reflexive pronoun at the beginning:
The reflexive pronoun for the 1st person is "me."
So we say "me afeito."
Step 5: SENTENCE:
"Yo me afeito." (I shave myself.)
This follows the structure you've outlined! Let me know if you need more help.