Im not too advanced, so take this with a grain of salt. However, from my experience, I find if there is any chance of interruption, you will have a subconscious fear of this interruption, and in order to protect yourself, you don't allow yourself to go too deep into a trance-like state. For example, maybe you have family who will barge in with no respect to your privacy or space. Maybe they do respect you, but you got kids who scream for no reason. Perhaps there's a construction site, or a risk of someone honking their horn for no reason. If this is the case, id recommend finding a creative solution to get around this, lest you build up a negative association. Try going to a forest, or and empty parking lot. If this is not the case, and you have no external issues which prevent full and proper meditation, then you may just need time and experience for these issues to resolve on their own. However, im still a baby Satanist, it may be best to wait until someone more experienced is able to answer, however I hope i was able to help you resolve this nonetheless.