Hi Taylor,
It sounds like you know who you are and what you have to do about. Now it's just a matter of figuring out how.
You're already on the right track seeing a gender therapist. If you want to start HRT now, get a letter from your therapist indicating that you're under their care and that HRT is the next treatment indicated in their protocol, which is usually all an endocrinologist needs to prescribe your hormones.
If you haven't started already, start electrolysis for any facial hair. Even if there isn't much there, it takes time to get it all cleared and under control, so get cracking on that. The longer transition goes on, the more internal pressure you'll feel to go full-time, and it's so much easier when this has already been attended to.
Hone your voice. Study how other women speak, and what they talk about. Learn... or remember, as the case may be.
Reach out to your local community -- a local trans support group -- even if that means a two-hour drive to a major city. Just having people to talk to in person who are already in the process and know the lay of the land where you live can be an incredible boon. (They can also generally provide good references for an electrologist and an HRT doctor.) Also, identify a second therapist, someone known for being accommodating if a second letter is needed for surgery.
Do not come out at work until your presentation is up to your own standards. I think it also helps to wait coming out to family until that time as well, it'll generally be easier for them to support this major change when it "looks" doable.
Save money. So much of this can get expensive.
No more bodybuilding. Switch to lots of cardio.
Study YouTube videos on makeup application, and practice practice practice.
Research the surgeries you think you'll need and who you'll want to get them with. Many surgeons have waiting lists -- you don't want to do this after you're full time, only to realize you've got to wait another two years to get everything finished.
And finally, think about what kind of life you're going to want to live once transition is over. Are you going to be out? Or will you be happier just receiving unmitigated female gendering? If it's the latter, start planning now -- which means limiting the number of people who know your story, culling those relationships that won't respect your womanhood or your need for privacy, and preparing for a new career.
Transition is a marathon, not a sprint.