Oh no. Please try other isekai for redeming your first with this genre.
Try those ones. They are all bl and have a isekai/"going back in time" theme
-Turning
-High School Return of a Gangster
-For You Who Grieves
-Approximal Guide
-Regas
-How the Sidekick Prince Lives Again
-A Guide Out to Succeed
Again is also a good read
As a person who is familiar with all the above
I'd like to make a suggestion
Try reading Turning novel as soon as you chach up with the manhwa
That shits gold in terms of
World building
Healing relationships
My first isekai BL...
Didn't see that coming.