Why are you afraid of making mistakes when speaking English? It is an innate feeling that is rooted in the corrections of our parents when we experienced the first words as a child. Will there have also been some very attentive teachers and point out mistakes, much less to gratify you? I hope not for you.
Read also 5 Golden Rules to learn English, in the paragraph “no fear” you will find other ideas. Then there is the fear of hanging in the middle of a sentence and not knowing how to express ideas and concepts. The brain always produces the same complexity of thoughts as when speaking in Italian, but in the case of the foreign language it has to pass them through a much narrower lexical funnel. How do you learn to overcome this fear? By treating English like a sport and not like mathematics or literature: practicing it concretely in the situation, stimulating your curiosity. It must become the tool to express ourselves and not a subject subject to votes. Why not use the green pen to mark things done right? Would you feel more stimulated by knowing how many things you do well or how many are wrong? Some of these ideas are the basis of the emotional educator method that you can find in all the experiences of the educational farm.