I guess with the erections it depends on how strong your dose is and what your T levels were at. Many factors can affect your libido....even your mindset, levels of anxiety, feelings of,fulfillment can all affect it.
I'm pretty sure that the,first thing I noticed was the lack of libido....within a week or two. I too masturbated almost daily. Now...perhaps once a month....if that.
I'm in my fifth month of HRT and I feel I'm doing well. In the beginning I was searching for changes...looking for anything which felt at all female. Well, we are all the frog in the pot as the water starts to heat up....it's hard to notice the changes as we are living and breathing in the changing environment. To prove a point, I've had breast development for a couple of months, getting more and more visible. However, last night while I was washing the way the soap in my hand had to go up and over the breasts brought to my attention what I actually have going on there. They might be the same size as a 12 year old in puberty....but I've actually got breasts...and from what i understand....I'll always have them now. It takes time, but it will happen....and you'll,have moments like mine where you will revel in the moment of being feminine.
Good luck!