Hi Eva,
Here in Oz, as I suspect is the same in your part of the world, a therapist or psychiatrist option is require to determine whether you have some form of Gender Dysphoria, that requires treatment using HRT. Once this dysphoria is established the letter can be written to the endocrinologist recommending HRT as a form of treatment.
The psych or therapist cover the endo. All 3 of which need to be licensed through the appropriate health system regulatory authorities. For your own sake and well being, it is better to engage a therapist or psych that are familiar with TG issues.
As for Ms. Larsens, I can't really comment on her methodologies, performance or outcomes. Personally I'm a bit suspect of her spiel, it has over tones of Gender issues being a sickness of some description, implying that it can be 'cured.' If that is her modus operandi, personally I'd avoid her like the plague. If not, have a session with her to ascertain how comfortable you are with her and decide. Ensure she doesn't put words into your mouth you are not comfortable with. Make sure she understands and respects your thoughts and feelings.
Hope it works for you. In the meantime, be safe, well and happy
Lotsa huggs
Catherine