Hello,
Goto appearance>>customize>>custom css and use code given below to make align all related courses at single course page in the bottom:
.course-template-default.single.single-course #buddypress .related_courses ul li .block_media a img{
height:150px !important;
}
.course-template-default.single.single-course #buddypress .related_courses ul li .block_content{
height:180px !important;
}
Refer:
https://prnt.sc/sthdxd
Use this code goto appearance>>customizze>custom css to remove category widget under unit:
.unit-template-default.single.single-unit #content .col-md-3.col-sm-4 .widget{
display:none !important;
}
Refer:
https://prnt.sc/sthiu4
Thanks,