I was married and out of the dating pool before I transitioned, so dating is not on my radar. But here are some thoughts:
As you transition, you may find that your attractions change. Someone who might have been bisexual but repressed one side of it prior to transition might find themselves opening up to the other sex. So someone who was attracted to women might find themselves attracted to men after transition.
Or not. Many people know that they are attracted to men only or women only and that that doesn't change through transition. I am only attracted to women, so I went from being (apparently) a straight male to a lesbian female.
There is no right or wrong in whom you are attracted to.
Be really careful! People should be careful when dating anyway, but while transitioning, and as a trans woman, you will need to be extra careful. Some people will want to pick you up for all the wrong reasons. If your presentation is good and you are pre-op, some men might pick you up expecting one thing and get a shock when they find something else. Trans-panic is accepted as a murder defence in every state in the US. Please don't become a statistic.
HRT will make you have the emotions of a 14-year-old girl. Your judgement might not be the best. You will need to access your adult brain to double check what your emotions are telling you.
If I had been single when I started my transition, I think I would have put dating on hold until I was stable in my new identity for a while. Transitioning is a huge project, and parts of it, especially the social parts, can be dangerous. I would not have wanted any distractions from transitioning.