Siebe,
I read one of your earlier posts about how you can understand intellectually about Buddhadhamma, but you experience emotional difficulties such as having a fear of losing control. Unfortunately I can no longer locate that post for further reference, so do correct me if I am wrong.
In my opinion, you can start by thinking about the bad consequences of continually harbouring such emotions (such as how you will be badly stressed and may commit dasa akusala just so as to regain control, or in order to curb that fear), and the good consequences of just letting them go (such as how much relieved you may feel, and how it may become easier and easier over time with repeated practise to just simply let go).
You can start step by step. For example, if you fear losing control of your money and possessions, you can donate some money to a charity, or give a dollar or two to a homeless man in the streets. Start small. Just think of it as investing in your future happiness if that helps. See how that makes you feel. Do you feel happier already for doing a moral act? Slightly less anxious about losing control?
What if you fear losing control of your relationships? The next time someone says something angry to you, can you give in just a bit more if you believe that doing so would only benefit the situation and not make it worse? Notice how that makes you feel?
Start little by little and slowly build up to more, if you feel like it. On days you can’t do it, don’t reprimand yourself but make a mental note to do it again the next day, so as to build up good habits. It may take time, perhaps even lots of time, but do persevere. In doing so, you would be cultivating sati and improving your gati bit by bit. All that is really worthwhile.
I hope this helps you, Siebe.