For example, if I'm playing Minecraft Bedwars with friends and I'm the last one, everyone is watching me. Always comes with me adrenaline with racing heart and where I get cold hands and tremble. How can I prevent this?
Situations in which the body pours out adrenaline are mostly unfamiliar or particularly stressful.
The more often you are confronted with a situation, the more normal it becomes for you.
So just keep playing, the better you get, the more relaxed you will be while playing.