Trending blog

Are you talking about the social media career? Because I don't remember ever being able to blog in the Sims 4, just keeping a Social Media account and writing on the computer simulates "blogging". If so, you'll also want a high Charisma skill as well for the media account to get that 'trending' if you will. I can't really help you further if you aren't specific with what you're asking for help on.

For the work at home task where you have to set a trend - I figured it out by click on my sim and the option come up to “create feminin trend” or even “create masculine trend”. Fixed it straight away!