1. This world of 31 realms is very complex. While most of us are not exposed to beings in other realms, there are some who can communicate with beings in other realms. See the post:”What Does Buddha Dhamma Say about Creator, Satan, Angels, and Demons?”
In most cases, it is better to avoid communicating with such beings. They may have their own agenda, and may try to steer one in a path they want to. When one firmly gets on the Noble Path, no such being can influence. Usually, when “good beings” want to help, they do that to the best their ability without trying to communicate.
As with people, it is always beings with similar “gati” that are attracted to people. So, when one’s gati change for the better, they automatically move away. But before that, they might try to influence one not to steer away from them.
2. Sometimes people do “no thought meditation” based on even instructions from other humans. I know that some people in Sri Lanka believe that Nibbana means getting rid of thoughts. They try remove all thought objects (arammana) that come to the mind. This is dangerous, because one can become “asanna”, i.e., lose “sanna” or perception.
If one has been doing such meditations, one’s brain could be wired for that. It is possible to re-wire the neurons by staying away from such types of meditations and doing it the right way. See the posts: “Truine Brain: How the Mind Rewires the Brain via Meditation/Habits” and “How Habits are Formed and Broken – A Scientific View“.
All these problems will go away slowly once one is firmly on the Path. Best to keep in mind that no one else (or no other being) can influence you if you know you are on the right Path.