iamfreee,

Well first off, the first thing that I want to commend you is choosing a great username. That little expression can help you on your journey to controlling your emotions. Next, if you are seeking help, I assume since you have graduated high school you have your drivers license? That being the case then you can always search for free trials by any psychiatrists or hypnosis therapists and take a visit for a free session/ 1 hr. etc. If that does not suit you, then there is always group sessions including depression and anxiety groups that meet to discuss their issues.
As for activities you can complete by yourself, the most common one would be journaling. If at any time you feel as if you are about to lose control of your emotions, instead of falling victim to them, quickly write it down in a journal. This can work at home or at school. When you feel your emotions raging, then stop and go to your room and write out your exact feelings you are experiencing. As for when you are outside, don’t be ashamed of bringing a pen and a small notepad. Carry it in your purse and write out your emotions. This will not work on your phone due to the fact that 1. You are not writing your emotions down and 2. If you try and do this on technology and there is any issue it will only frustrate you even more. If you feel embarrassed about taking out a pocket notebook and writing stuff down in public then just resort to a private area such as a bathroom, etc. All the best to you.
Thank you and take care
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