Romaji alone cannot teach pitch accent. Find the accompanying audio (often sold separately or on CD). Listen to each dialogue and repeat aloud—this is called "shadowing." Mark the intonation patterns directly on your PDF.
You can find the Shin Nihongo no Kiso I (Romaji Edition) and related study materials through the following community-shared resources and official publishers: Digital Copies & PDF Resources : Multiple users have uploaded the Shin Nihongo No Kiso I Romanized Edition which includes the lessons in romaji. You can also find the Grammatical Notes English Translations on the platform. Internet Archive : You can borrow digital versions of the Shin Nihongo No Kiso 1 Renshu-cho (Workbook) through the Internet Archive Facebook Groups : Language learning communities like JapaneseAZ.com
If you're interested in learning more about Shin Nihongo no Kiso 1 or Japanese language learning in general, here are some additional resources:
: Short Q&A dialogues demonstrating the patterns.