Help please

I am new to the website. However, I don't have porn addiction problem. I have left before using this website. In fact, I don't even remember when was the last time I watched porn.
But, I have another problem. Or is it a problem? However I am talking about my masturbation addiction. As I have been doing it for a long time, I can't control it. Sometimes, I do it 3-4 times a week. I have attempted to get rid of it, and, in one of the attempts I didn’t do it for more than 21 days.
But, it didn’t last. I am back to that stage.
Now, my question is -

1. Is masturbation good or bad? Some says it's good. Some says it's bad. I am in confusion.

2. My penis is, I think, smaller than I should have at this age. It's also not that strong. When I masturbate, I can't last more than 1 or 2 minutes. Is al of these happening because of masturbation?

3.I have sexual thoughts in my head. Actually, I feel attracted to the girls older than me who have fat body, especially big breasts and ass. And these thoughts ultimately lead me to masturbation. And when I masturbate, I feel like I am having sex with them, touching and sucking their breast. I feel the urge about a lot of girls - my techers, aunts, neighbours. Is it a problem?
In this moment, proper guidance and help can get me out of all of this. Please answer my questions and help me. I don't want to lag behind because of masturbation.

 

Friend some people say it's good, some people say it's bad. So it confuses me. But I am concerned about my penis. It has a little curve and sidewise not so big. And, I can't last for more than a minute. That's what frightens me.

 

I don't work out that much as I am a student and currently having a lot of pressure. But, I don't eat junk foods. Friend, some people say that eating meat, milk is one of the reasons of masturbation. Do you think so? And do I need to be a strict vegetarian?

 

Thanks,
But, as I said in the post, I feel attracted to girls who are older than me and have fat body with big breast and ass. It's not like that they are showing their body to me. But I feel this way. And these are my teachers, neighbours, some relatives and, sometimes, strangers. Is it normal? Or I had to check it too?