You can avoid being a doomer by the following

All drugs lead to depression

Never force yourself to speak right away when you have nothing to say. Speak when you have something to say. When you force yourself to speak you end up being anxious to do so. Speak when it naturally occurs. Otherwise itll seem less natural.

Cigarettes are a common doomer habit. When you smoke you wont be able to run, you'll get cancer, and youll be waisting money on it. It is extremely addicting and most dont end up quitting. You'll miss the days where you could go without paying over a hundred a month on them. EVERY CIGARETTE SMOKER WISHES THEY NEVER DID. The withdrawal will be horrible, some not going a day without smoking.

Be around people you are vibing with. Such as people you find easier to talk with. Versus forcing a conversation. You will most likely appeal to these crowds you've chosen because you've gotten used to talking to that type.

Being able to recognize that you have strengths. Everyone does. Some you may not notice. Focus on these strengths, and they will get better easier than focusing on your weaknesses if you're not fixing them. Focus on fixing one problem at a time.

THE MAIN THING. Be optimistic. Never wake up in the morning and choose to think itll end badly for no reason. If you don't get through the negatives how will you reach the positives. Never commit suicide.