650 Hours of german and i feel B2 ? should i study structuly for the exam ? ( CI )

As said in the title I have been studying german and have spent those 650 hours like :

the absoloute first 150 hours were ALL spent on extremely Intensive reading idk how many words i read but i read ALOT ,

the other hours were all extensive reading and semi intensive watching . at times i be js doing pure CI but maybe 20% of the time i kinda picked the key words that i felt very key to the subject for me to grasp what's been said and js instantly translated them ( using a youtube extention )

where am I now ?

i watch channels like simplismus and mrwissen2go , wohlstand fur alle whitcch r primerly lituture and history and politics channel . and i can comfortably say that I rly do comprehend the msg and GREAT deal of what's been said . i js wanna ephasis more on to what lvl i understand , id estimate it to be 95% . and the other words i can in alot of cases guess the meaning cz german complex vocab is always a compund of other smaller words so i js need a moment to think abt it and get it . i also read great dael of dostevsky's brothers of kramazuv ,

i also checked the most frequently used 3000 words of german anki deck and i think from the sample i took i know 95% of it

so as u have read , i feel like B2 + at listening and reading , but my output ABSOULOUTLY SUCKS , i dont even know what to do cz i have an exam at septemper should i js start studying structurly for the exam or will i make it till then ? ( knowing that according to my esstimations ill have 1500 hours by then ) i feel like i have no chance of succeding at writing cz i have dyslaxia and speaking dont even talk abt it .

also i noticed my perfomance overcame alot of purists ( ppl who believe through ONLY comprehensible input u can learn the lang ) , do u think its bcz of the extremely intensive reading ? i did it that way cz i HATE anki and i had to know the first 1000 words