Depending on a range of things it is unlikely they will have you on HRT by the end of the first appointment. Some of that will depend on where you live (state, country), the local legislation, whether they practice informed consent, etc, etc. most counsellors would probably want to talk to you a few times to ascertain you understand what you are potentially getting yourself in for, to discuss your gender identity issues, why you would like to transition and so forth. Once you get to see a endocrinologist or a specialist doctor it may depend on your health, your weight, and so forth before they get you onto HRT. Yes HRT can help but it isn't a panacea and there are other elements involved in addressing and reducing gender dysphoria. First steps first, find a good therapist or counsellor that is willing to help you. Depending on where you live there may be plenty or you may need to look further afield.