Apache :: Setting Up URL Rewrite Rules Multiple VHs

I'm kinda new to apache and I have the following situation.

I have a vps, on which I have set the following:

WordPress Site A, has it's own VirtualHost and domain
WordPress Site B, has it's own VirtualHost and domain
Canvas LMS (not connected to a domain).
Canvas LMS can add multiple accounts, which may (or may not) be accessed individually using a URL that looks as follows:

{canvas_root}/accounts/{account_id}/

For example : http://....../accounts/4/

I need to add a link to each of WP sites, which points to each site's account on Canvas, such that it appears as .../learning/ folder

For example:

Code:
http://WPSiteA/learning/
http://WPSiteB/learning/

which actually represents

Code:
http://WPSiteA/accounts/4/
http://WPSiteB/accounts/5/

Which in turn represents

Code:
http://{my_vps_ip}/accounts/4/
http://{my_vps_ip}/accounts/5/

respectively

Noticing the following:

I do not want the users to see the /account/4/ , just /learning/
I also want to prevent accessing
Canvas LMS is located beyond the website's DocumentRoot
I want this to work with both HTTP and HTTPS