Genki 2

Pros

• Buy textbooks like Genki 1 (N5), Genki 2 (N4), Quartet 1 (N3) and Quartet 2 (N2).
• I just finished taking a test for my Japanese class on lesson 15 of Genki 2
• This is from genki 2 on lesson 13's 読み書き編. I understand everything but I can't Identify the conjugations for the bold parts.
• Genki 1 and 2 are amazing
• I finally finished kaishi 1.5k and am close to finishing genki 2

Cons

• In Genki 2, what does the ga in the end of ”私、ジョンワンと申します。 アルバイト募集の広告を見たんですが。“ at the end mean? I know it can mean "but", but I'm not sure how it incorporates here.
• 現在Genki 2第１３課を勉強している、でも「なら」は難しいと思います。
• I’m a week from finishing Genki 2 and not sure what I should take on next.
• A student wrote a text, and I need to change the verbs into humble forms if needed. (Genki 2 textbook, L20, ex3) 先週、東京に行って、山田先生に会いました. The Genki solution is 先週、東京に行って、山田先生にお会いしました. The first verb is not changed.
• I've just started Genki 2 so the L1 readers seem to be the right level for me