Can you recommend me a good, safe and reliable wallet, please?
I'm sure you have more experience in it.
I use myetherwallet and I have no problems with it. As long as you do not share your private key to anyone else or any access for that matter then your coins are safe. You should always be careful when accessing some sites because there are times when you thought it is the legit site that you are accessing and it turns out that it's a phishing site and you end up losing all your coins. Being careful when accessing the sites is the way so that you can manage the risk like always accessing the site through bookmark and not just search it in google.
This was the problem. many are easily or can't store private key properly. many are too greedy and easily tempted to be big results on crypto and when it's already mastered myself then bad things will happen. fooled by a major project but not being too thrilled to unknowingly enter a private key. or also because of phishing sites enter in because it felt it was the site of a large project. This is the problem and indeed fear losing it arises also because of his own mistakes.