My hp b210a will not grab the paper

This problem is usually caused by worn-out pickup rollers. Unfortunately, there isn't much you can do outside of replacing the printer since the rollers aren't designed to be replaced (at least easily).

I also suspect the printer has a lot of printed pages (10,000+) just based on its age alone (~2010 release). This isn't always the case, but it's usually what I see on printers this old. The problem with a page count this high is there will be a lot of built-up waste ink, and the waste ink assembly is either nearly full or fully saturated.

This becomes a problem on old HP inkjets because the waste ink counter does not reliably stop the printer from spilling waste ink. In many cases, the only way you find out its waste ink pad is “expired” is a puddle of black ink that the pad doesn’t stay in the printer. As far as I can tell, HP allows their printers to operate this way by design, or the counter does NOT work well. Sadly, it's better to recycle the printer and get a new one due to the economic failures of printers is to try unless you're dealing with a laser, get the part cheap, or secure a donor who has cross-swappable parts, and it needs $400+ in toner, for a $350 model.