do you have any control panel like cPanel? that will manage all your sites well.
then install lsws cPanel plugin, it'll replace apache. in this case, you can just think your webserver is apache and config all vhosts like before in httpd.conf or through cPanel GUI.
if you need trouble-shooting, either purchase 1-hour support listed in
https://store.litespeedtech.com/store/cart.php?gid=5 and use this forum, but need detail info of the issue.