I don't think I can add much more than has already been said! I pass, to the degree that I get odd looks when out as 'male' or at least in men's clothes. I get the odd pause when giving my male name in phone calls and it's getting more noticeable now facial hair removal has had a dramatic effect (there wasn't much to begin with lol).
Think about the first time you went in to your office, or wherever, for an interview. You were anxious, scared even. Full of trepidation as you stood to gain so much from making an impression. It was a time to put on your best self, to upsell and to pretend.
Now think about the second time you went there, the first Monday with the job so to speak. You were excited, confident and outgoing. You were keen to meet your colleagues, ask questions and make friends.
Passing is all about being in the second stage. Congratulations, you've got it!! I'm delighted to offer you the job of being a full time woman; hours are midnight to midnight Monday to Sunday, there's no salary and you'll be allocated zero days of annual holiday.
Life isn't about being in the contrived interview scenario. It's about getting on and being who you are. There are women out there who look more masculine than I do. Do they worry about passing? No! In which case why should I worry about passing? Women come in all sizes and colours, and some have differently shaped genitalia. That doesn't matter. Gender, or what we term as gender, comes from within. If the inside is female, then female-ness will shine out in a sort of aura. Just find it and listen to it.
For example, when in public as me, I use the ladies loos. I really have to, as it would look totally weird going in the men's. Some would say don't make eye contact, just shuffle in and leave hurriedly. I don't! I fix myself up in front of the mirror, powder my nose (literally) and fix up my lipstick. It's a fairly social place anyway, and I chat to people. They talk to me and everyone's happy. I'm not in there to be a pervert; I'm in there to have a wee for God's sake

and wash my hands.
Therefore people will think you are weird if you act weird. If you act normal they'll take you as nothing but (I don't know what you look like so I'll use myself here) a slightly unusual looking woman. Or they simply won't notice you at all.
If you truly believe you can pass, you will pass.