Blockning yourself is something I used to hear a lot and still do at times. It can mean many things, in my case it meant I wasn’t thinking I were capeable or had developed enough to complete a task a spirit f.e asked of me or I was at times over thinking a task, and therefore wondered if I were doing the right motions, channeling correct information, etc. in short: self doubt - very common.
Another meaning it can have other than the above taking the said words of a spirit or a task at face value or looking to closely at details, therefore missing the real lesson or point of an exercise or task.
@Micah this can be related to energy work and any other discipline as well. In your case don’t overthink simply do the exercises and not think so much about how and why you do them and instead focus or rather de-focus and allow yourself to become one with the exercise until it’s not something consciously done but constantly embodied.
Azazel and the like can appear cryptic but their words coal covered diamonds once you understand what they are tying to teach.
If it’s Spiritual attack I got a minor ritual I can PM you about.