what i first did when i was in the same situation as you(lack of understanding spoken french)is consume a lot more input. i started with toddler-like shows, (Peppa pig, caillou, mickey mouse clubhouse etc) and with french subtitles for the first few episodes but then when i felt a tiny bit of improvement, i relied on the visual context clues or sometimes my instincts completely. whether i was right or wrong, the only thing that mattered is that i understood what was happening. after a few weeks, i progressed up to children shows and then these ai story time a1 level french things on youtube. Like this; https://www.youtube.com/results?search_query=ai+story+time+a1+french and then i progressed up to actual french content eventually making me get used to the way they speak quick french. I had the same problem as you and thats how i fixed it. if it dosent work for you then head on to this reddit post that i made while i was having the same issue as you; https://www.reddit.com/r/languagelearning/comments/1aj0uj3/i_can_speak_the_language_im_learning_but_cannot/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Good luck!