Read 1. Verb Conjugation on page 86 of the Textbook. Memorize the personal pronouns
Read 3. Verbs with -е-/-ё- conjugation on pp. 87-88 of the Textbook. Memorize the endings for each type of verb.
Note that in Russian there are two way to express a language. This is explained in detail in section 6. Talking about languages.
With the verbs знать, we use the name of the language as an adjective followed by the word for 'language': русский язык, немецкий язык, английский язык, etc.
With the verbs писать, понимать, читать we use an adverbial form of the name of the language: по-русски, по-английски, по-испански, etc.