We use the simple present tense to talk about regular or habitual actions. When Jessica says, “I psych myself out. I get sweaty palms. I start to hyperventilate,” she uses the simple present tense because these things always happen to her. It is a fact of life for her.
With the pronouns I/you/we/they, regular verbs use the base form in the simple present tense. For example, “I play basketball,” or, “We love watching movies.”
With the pronouns he/she/it, most regular verbs use the base form with an –s ending, as in, “Devan hates the holidays.” When the verb ends with -ch, -sh or –ss, add –es, as in “She watches a lot of TV,” or, “He misses his mom.”