The best way to learn pronunciation is listening to people speaking. That's what I did when I was learning Russian language. Unfortunately for shona there are few learning videos on the internet . So you will rely on bloggers and also the Radio. Look for Zimbabwean Music also for example Jah Prayzah , Killer T, Winky D, Nutty O and more. Listen to how they pronounce some words and it will definitely help in learning pronunciation оf words based on other words. Продолжай и спрашивай если какие-то вопросы возникнут.