Which platform do you find most attractive for recurring crypto transactions? I need something that allows me to work with the exchange alone. I am not ready to pay a broker.

Many traders work alone. Many exchangers allow this. But I advise you to study the techniques using trading bots. A typical example is napbots-with-kraken. Such software allows you to make transactions automatically within a certain range. This is not only convenient, but also provides a significant advantage in terms of profit.