I'm a newbie and have been into crypto for a couple of months now. I must say the advice from other members about not checking trades too often is very good. One can become obsessed with it, and I think the thrill of the "win" can be quite addictive. Similarly that depressed feeling when the world is "red" can be deflating as well. There must be a "happy" medium, if one is to maintain a balanced life.
Just relax, you will soon learn how to trade and not be addictive. first time you will need to check periodicaly the price . Then you will know when to buy and when to sell. It is normal dont worry about that. Every new trader feel like you now.