Does anyone have any recommendations of something similar to debut or die, my second life ...

yes, but it's BL. If you do not mind, then here it is:

• Meteor Orbit (manwha, reverse harem, second chance)
I honestly can't stop recommending this one because the protagonist is so damn mature, funny, and ready to take advantage of the second chance he is given in his life to revive his idol dream.

https://www.mangago.zone/read-manga/meteor_orbit/

https://www.mangago.zone/read-manga/monochrome_rumor/

https://www.mangago.zone/read-manga/superstar_from_age_0/

https://www.mangago.zone/read-manga/saving_the_doomed_idols_with_my_touch/

tyy!!! the recommendations look rlly good i'll check them out :))

you're welcome! happy to help ^^

will def check out!!! ty!

https://www.mangago.zone/read-manga/once_again_idol/

https://www.mangago.zone/read-manga/top_star_s_talent_library/

https://www.mangago.zone/read-manga/saving_the_doomed_idols_with_my_touch/

https://www.mangago.zone/read-manga/the_genius_idol_s_strategy_to_stardom/

https://www.mangago.zone/read-manga/wild_idols/

https://www.mangago.zone/read-manga/my_superstar_uncle/

https://www.mangago.zone/read-manga/second_life_producer/

https://www.mangago.zone/read-manga/i_just_want_to_be_a_normal_idol/

https://www.mangago.zone/read-manga/star_dream_idol_project/

https://www.mangago.zone/read-manga/buddy_go/

https://www.mangago.zone/read-manga/superstar_associate_manager/

https://www.mangago.zone/read-manga/aplicaci_n_humillante/

https://www.mangago.zone/read-manga/monochrome_rumor/

https://www.mangago.zone/read-manga/the_ceo_is_an_idol_stan/

https://www.mangago.zone/read-manga/hyung_you_re_my_idol/

https://www.mangago.zone/read-manga/the_secretary_s_debut_project/

https://www.mangago.zone/read-manga/the_path_of_star/

https://www.mangago.zone/read-manga/cherry_doll_scandal/

https://www.mangago.zone/read-manga/how_to_avoid_debut/

https://www.mangago.zone/read-manga/starlight_scandal/

https://www.mangago.zone/read-manga/insecret_1/

https://www.mangago.zone/read-manga/my_bias_appeared/

https://www.mangago.zone/read-manga/star_x_fanboy/

omg ur literally amazing!!! once again idol already looks rlly good ty!