That actually sounds like a really interesting premise but I think I only know of stories where the mc is reincarnated as a maid for nobility
I know it's a lot of em but hope you can at least enjoy one of them (￣∇￣")
http://www.mangago.me/read-manga/koushaku_reijou_no_tashinami/
http://www.mangago.me/read-manga/lady_rose_wants_to_be_a_commoner/
http://www.mangago.me/read-manga/milady_just_wants_to_relax/
http://www.mangago.me/read-manga/reiko_s_style_despite_being_mistaken_for_a_rich_villainess_she_s_actually_just_penniless/
http://www.mangago.me/read-manga/moto_kizoku_reijou_de_mikon_no_haha_desuga_musumetachi_ga_kawaii_sugite_boukenshagyo_mo_ku_ni_narimasen/
http://www.mangago.me/read-manga/magic_artisan_dahliya_won_t_hang_her_head_a_free_craftsman_life_from_now_on/
i am looking for any manga/manhwa/manhua where the mc is reincarnated as a villain but ends up living a commoner lifestyle. or any manga where the mc lives a commoner lifestyle but was formerly a noble.