hi,
i have just checked the speed of your site;
https://prnt.sc/sh5y5v as you can see the slowness of your site due to java scripts and non optimized 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 woocommerce (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 7.0 or 7.2
Also follow this caching tip : https://vibethemes.com/documentation/wplms/knowledge-base/wplms-with-w3-total-cache/
Deactivate plugins that you don't feel necessary.