Doing dhikr but idk if it hits

I started doing dhikr after namaz like Astagfirullah and other things but idk if that time i am saying it with my heart i sometimes feel like im just saying words and not feeling them im scared bcs i have done sins and is it bcs of those sins that now i dont feel stuff more like praying etc its like i am just praying it bcs pf a habit but not bcs i feel smth idky i dont feel stuff i want to when reciting Quran i do read the translation that still hits but idky not this i cant cry like i used to is my heart becoming of stone idk what to do to fix it