I’ve found that sharing your own experience and how you yourself might do or have done something is usually a pretty good way to avoid making assumptions and sounding like you’re giving unsolicited advice.
Instead of saying something like, “Reading about implicit bias might be interesting. Unfortunately, it is still a real problem . . .” you could say something like, “This article taught me a lot about implicit bias and how it’s still a real problem.” That way you would show that you’re working to educate yourself, not making assumptions about others’ knowledge and experiences, and you’d still be recommending it for others who might be interested.
Also, “Your manager/company are the ones you will be spending huge amounts of time and making sure it is a good fit for both you and the company in terms of the work as well as the culture is really important” could be changed to “Managers/companies are the ones we spend huge amounts of time with, so I try to remember to make a good effort to see if we’ll be a good fit.” Etc.
I hope this is helpful!