A high bounce rate is not bad in this instance. The good thing is that you KNOW this. (Or, not sure.)
Sometimes people are just looking for answers. And, don't have time for anything else.
The point that they stayed that long reading the content on the page is a GOOD THING. Google knows this. You will not be penalized for this.
The only BOUNCE counted are the ones that send the users back to GOOGLE right away.
What I do is adjust Bounce Rate with Google Tag Manager to only count bounce if longer than 30 seconds. (You can increase it to whatever number you like.)
Do a search for 'google tag manager adjust bounce rate'.
Embed links of related pages in your content to internal pages.