Nearly all boys begin to masturbate regularly during their teenage years. There is a balance that must be learned to keep this a positive activity in order to manage the sexual tension which builds up over time.
Puberty begins when your body is ready - not when you decide. No one ever seems to be completely prepared for all that is about to happen during this time. Learn to accept the changes and the timing of it all - you can't delay or stop the changes.
These are really common with teenage boys and a lot of guys worry about what the dream was about. Don't read anything into the dream. Weird/unsettling dreams is one of the stages most guys go through. You can't stop the dream or the wet bed.
Most guys worry their penis is too big or small or thin or bent or long or short or just plain different. Nearly every guy worries about this, especially in their teenage years. You are most likely more normal than you imagine.
All boys, during puberty, get a strong interest in other peoples' bodies. Lust can't be eliminated and is there to eventually bond you to your lifelong sexual partner. In the meantime you need to learn to control your eyes and direct your sexuality in a positive direction.
All males find a strong attraction to porn which begins during the teenage years. This desire shows you that things are falling into place in your mind ready for your lifelong sexual partner. It is best to learn to control this attraction until you can share another's body in a committed relationship, preferably marriage.
The best 'big picture' choice for your life is to be a virgin when you marry! The choice rests solely with you and you will live with the consequences of your choice. You will bring a unique gift to your marriage by choosing to wait.
One aspect that struck me about your site was how it resonates the voice of a boy. I feel that what you write is "true" in the sense that it is neither prettified, nor dramatized or oversold. I see an honest depiction of a young male.