i have checked your site speed
and it is not so good so i suggest you to
check http://prntscr.com/uni9gx
as you can see the slowness of your site due to java scripts and nonoptimized images.
please follow the instructions mentioned here: https://gtmetrix.com/reports/demo.tradelineacademy.com/jlrFQ84z
Also, we usually recommend VPS or dedicated server for wplms.Wplms is not just a simple theme like others which are just used to display pages.Wplms has so many features and settings related to LMS . IT also uses buddypress (social plugin ) and woo commerce (used for products and payments ) which are in itself a bit heavy for shared hosting.
Hosting service we recommend is Wpengine.
install this plugin “query monitor”
refer this tip to know which plugin is actually putting load on your server : https://kinsta.com/blog/query-monitor/
Using caching techniques like Memcached, opcache on server-side might improve some speed .
Also try switching to PHP version 7+ with latest
Also follow this caching tip : https://vibethemes.com/documentation/wplms/knowledge-base/wplms-with-w3-total-cache/