"Interesting" can describe any noun, but "interested" only refers to how a person feels. So a book can be "interesting", but it cannot be "interested" because it does not have feelings. So, "I'm interested in this book, because it is interesting." As another example, I could be "excited" to go on a trip. *I* am excited, because *the trip* is exciting. Does that make sense?

Ed is added to form an adjective with a passive meaning. Ing is added to form an adjective with an active meaning. Eg: The film is so boring, it makes me bored. With an example above, you can see "boring" is to show the status of one person/thing, and "bored" is the way this person feels of the film

If you describe something with an -ed adjective, it has received a feeling or action. If you describe something with an -ing adjective, it has caused the feeling.

the verb plus ing = the gerund or the verbal noun the verb with ed = past tense or past participle, and could be used as adjective when you say interesting things, it means these things are interesting in general while (I am interested in learning languages = I like learning languages)