To be honest, there is no way to filter out the short form at the moment.
To solve the issue, I would advise learning short form from other sources, instead of jumping many chapters ahead in the book.
https://bunpro.jp/grammar_points/12
https://bunpro.jp/grammar_points/26
https://bunpro.jp/grammar_points/51 (less important)
https://bunpro.jp/grammar_points/41 (less important)
In most cases, you will need a dictionary form and non-past negative form.
Which are fairly easy to learn.
You can also guess the short form of verbs you already know from their ます form.
You simply remove ます, and then:
if the part with ます removed ends with a syllable that ends with i, you change that to u. Now you have a perfectly fine う verb.
So. for 起きます(おきます - to wake up) -remove ます-> 行き - ki to ku -> 行く
働きます (はたらきます - to work) -> 働き -> 働く
休みます (やすみます - to take a rest, take a holiday) -> やすみ -> 休む
終わります (おわります - to finish) -> 終わり -> 終わる
貸します (かします - to lend) -> 貸し -> 貸す (う verbs ending with す tend to have only 1 kanji, as opposed to する verbs, but remember this is
EXCEPTION:
来ます (きます - to come) -> くる
(there are only two irregular verbs you have to learn, する and くる)
if the word doesn’t have syllable ending with i after removing ます then it is
る verb (いちだん, ichidan verb), then after removing the ます you simply add る
食べます -remove ます->食べ-add る->食べる
IRREGULAR
if the word is made from word of Chinese origin (in most cases made of 2 kanji, many exceptions here, but should be enough for a while) or English loanword with suffix します, you change します to する
勉強(べんきょう)します -> 勉強する
コピーします (to copy) -> コピーする