To say what you are doing at the moment, you use the present continuous tense.
To form the present continuous, you use:
|(yo)||estoy||+ present participle(-ando, -iendo, -iendo)|
This is the equivalent of the English verb form which ends in '-ing'. To form the present participle, remove the -ar, -er or -ir from the infinitive and add these endings:
A small number of verbs (including some stem-changing verbs) have irregular present participles. For example: