Hi there. Humidity is extremely important in bloom so technically you should work around 50%-55% in early flower and drop it to around 40%-50% in late flower. However don’t freak out if you don’t have massive control over your room. High humidity levels are not so bad if your air circulation is on point. Not sure what’s your conditions but if you don’t have dehumidifier try to control lots of air movement inside your room or tent. You need to get rid of “old humid air” from your area and replace it with “fresh air” - as said with air movement as a key. You can get fans really cheap now.
More extreme options to try lower humidity is to put inside bucket with grill charcoal.
Still, good to think about dehumidifier for the future.
Good luck and hope it helps 🤘