I agree with the others that if you decide to go on HRT, you will do well. None of your features seem strong or too masculine to me, but even people who have some features like that notice that they become less of an issue on HRT. I started at age 28, and by that point in my life, I don't think anyone would have looked at me and thought "I think that's a woman". In fact, I was terrified to start transitioning, because I couldn't imagine how I could possibly ever pass or even look half decent. At this point, I need some makeup and hair styling to be accepted as female, but people get the message quickly. I had about 20 strangers address me by female pronouns today alone, and I started off in a much worse place than you are.
As for looking like your sisters, it varies. If I had started transitioning around your age, my sister and I might look pretty similar. Starting at the age I did, we look fairly different because of all of the changes testosterone made to my bone structure during my 20's. I probably look like my sister would look if she had experienced a lot of testosterone for a few years, then went back to her old hormones. Maybe someday in our 40's, my sister and I will look a lot alike. Starting at your age, you'll either look like you were assigned female at birth (which with your features is very possible), or on the off chance that you don't end up looking totally passable on just hormones and laser, you'll still look good in women's clothing and not stand out in a bad way while living life more comfortably.
