I have to say you might be surprised about the number of resources available on YouTube and TikTok. After all we all need things explained in a different way from a different perspective from time to time. YouTube can be useful to understand a concept in a short amount of time and you can then get an in-depth understanding and knowledge from journal articles.
If you are studying a subject that is very popular and you classmates have less clue than you (it happens pal) you might want to give a little try on Facebook groups and LinkedIn pages. All business students have done modules like: Business Law, Operational Management and Human resource management. Type the module in the Facebook bar research or on the LinkedIn bar research and have a try. You might need to do a little play as some courses might have a slightly different name based on the country of the institutions, for instance the module Human Resource Management might be called People management in some institutions. Have a little go and see what’s up there. There is someone in Arizona who has just solved the same issues with Excel that you are struggling with, and they can’t wait to share it on the internet. Speaking from personal exp, these YouTube videos who explained how to properly do pivot table on excel, they saved me. Same things can be useful for TikTok, but I can’t help, I’m a gen Z and have zero clue on it.