Accidentally using Serbian-influenced vocabulary/phrasing?

I’ve been learning Macedonian with a tutor who is from a border region, and I’ve realized I’m occasionally slipping in words that locals are telling me sound 'Serbian' or just not quite right for North Macedonian standard speech. How can I filter out these regionalisms and make sure I’m sticking to the Skopje-standard dialect? Is there a specific media source I should prioritize to 're-calibrate' my vocabulary?