Can youive from one branch to another? So if you were invited into the grand Lodge but you don't like the all male aspect can you move to a different lodge?
I don't personally know of any examples and it would not be quick, but I don't see why not. You don't get a black mark against your name for starting out somewhere else.
It would be easier to move within branches that follow the same rite. Especially within the same obedience, you can just request to move from a single-sex lodge to a mixed one.
And also, how much has it changed over the years?
It has not changed much in our women-only branch since I joined, but it was fairly liberal to start with. There have been some changes in the male-only grand lodges under Grand Orient, most important of which was that they decided about 10 years ago to let individual lodges decide if they want to start accepting women or not.
I am not aware of any changes in the conservative branch that includes United Grand Lodge Of England.
Is there a lot of reform in terms of teachings or is pretty much the same as it was a couple hundred years ago?
The allegories, symbols, and traditions remain more or less unchanged. Some major aspects such as initiating women into Freemasonry and requirement of a belief in God have obviously changed in the liberal branches.
There are supposed to be no dogmatic limitations in Freemasonry, which means it should never freeze into a standstill although we carry forth the 'method' and rituals. That is the way it is practiced in the liberal branches of Freemasonry.