Gahh. I've discussed this in real life with my parents and in sex ed, but I have never done it online. I'll try my best though.
Some of the changes that happen include your genitals growing larger, hair growth in places such as armpits, pubic area(s), chest and face. You may start to feel different feelings than usual towards the opposite sex. You may not think of them as just "pretty" anymore. You will still feel and attraction to them, but it will just feel a little more different. You also may experience frequent mood changes/swings.
The second thing that I'm going to be talking about is wet dreams. Also called Nocturnal Emissions. This is a kinda uncomfortable topic, but if you want to know full information on puberty- you might as well read this. What may happen is you'll one morning or night wake up and have a wet spot on your bed. The most usual thing you will be thinking is, "Oh crap. I wet the bed!". But the thing is, you really didn't. What happened is that you experienced an ejaculation during sleep. it may happen with or without an erection. What I learned from Sex ed is that you cannot wake up during a Nocturnal Emission or simply sleep through it. Many people have different methods of what could have caused the Nocturnal Emission. Popular reasons include, stimulation of genitals by a mattress or sheets, by erotic dreams, or by memories of sexual activity or thoughts. However research has shown no conclusive connection between masturbation frequency and nocturnal emissions. They may occur a little bit after you hit full puberty or even many years after you have hit puberty.
Puberty is very confusing for males and females but the most important thing to do is just face it. You can't do anything about it at all and it's just a natural part of life. If you don't like the word puberty, then just think of it as becoming a man.
I wonder if that's enough info for you? Hope it helps! (;