really need a shoujo manga centered on calming topics(?) #－.－) like flowering, baking,...

What about cute manga about magic?
https://www.mangago.zone/read-manga/the_savior_s_book_caf_in_another_world/

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

Farming life? Countryside?
https://www.mangago.zone/read-manga/this_love_is_a_traves_tea/

Baking
https://www.mangago.zone/read-manga/fake_cinderella/

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

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

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

I have a couple that you might like (they are mostly about cooking/food related):

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

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

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

Hope you like them!!

"This Love is Strawberry Sweet"
Thank you to the random person who recommended it here recently. It's just adorable x3