Transition takes a while - 3. maybe 5 years. sometimes longer. Everyone has a different path and a different schedule, but here is my advice to you.
No not you, the transitioner... YOU. the person who knows someone who is transitioning:
You are super lucky. You have the opportunity to watch a friend or loved one grow into themselves, physically, mentally, emotionally. You can watch them open up, become themselves, literally COME ALIVE before your eyes in ways you might not have thought possible.
And it is beautiful. One of the most beautiful journeys a person can take. The journey to Themself. Not a mystical island. Not a distant city. Themself. You get to watch that. And support it. And be there for them.
There is profound beauty to the trans experience. Beauty and joy. A thousand tiny ohs that lead to a whole person.
And you can be there, holding their hand.