When you talk about your day in German — what you do in the morning, what you eat, where you work — you need a present-tense verb conjugated to match who is doing the action. Regular verbs, which make up the vast majority of German verbs, follow one fixed, simple pattern once you understand the mechanism, even though it can look intimidating at first.
Here's how it works: every verb in its base form (the infinitive) ends in -en, like machen (to do/make). To conjugate it, drop the -en to get the stem (mach-), then add a different ending depending on the subject: ich mache, du machst, er/sie/es macht, wir machen, ihr macht, sie/Sie machen. These four core endings (-e for ich, -st for du, -t for er/sie/es and ihr, -en for wir and sie/Sie) apply to more than 95% of German verbs, so once you know them you can conjugate almost any new regular verb you meet.
Two small details deserve attention. Verbs whose stem ends in t or d (like arbeiten, to work) insert an extra e before the du and er endings for easier pronunciation: du arbeitest, not du arbeitst. And a handful of very common verbs (exceptions to memorize individually, not a general rule) change their stem vowel only in the du and er forms: fahren becomes du fährst, essen becomes du isst, sprechen becomes du sprichst — while every other person keeps the original stem unchanged.
There's an important contrast worth noting here. In some languages, the verb ending alone can tell you who the subject is, so the pronoun can often be dropped. German verb endings also mark the subject, but the pronoun (ich, du, er...) must still be stated in almost every sentence — you cannot omit it just because the ending already shows who's acting.
So a very common beginner mistake is dropping the pronoun because the verb ending seems to make it obvious, saying Arbeite viel instead of Ich arbeite viel — but that sentence is grammatically incomplete in German, no matter how clear it seems from context.