Although the doctor can recommend treatments and advise you, it is up to you to decide whether you want treatment or not. You don't have the right to demand whatever treatment you want but you have the right to refuse. Many want clear advice from doctors about what to do, others want to decide more for themselves.
It is also difficult to know what the disease will mean for you. Perhaps you have an idea and a concern that it will turn out in a certain way. It is not at all certain that this is the way it will be. The best thing is to tell your doctor about your thoughts and perhaps ask about how things are likely to be in your case.
You can prepare yourself by thinking about what you are worried about and what is important to you. Then it will be easier to have that conversation with your doctor.
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Many diseases have patient associations or other information, which is addressed to you as patients or relatives.
That information is preferable to searching freely for one's diagnosis online.
In the tab forms of care you can read more about what you are looking for and what care options are available in Sweden.