So my girlfriend and I tried out some BDSM stuff for the first

I'm not into bdsm, but to be a good dom I guess you just do whatever you want. Don't try to play a role, just do what you want and forbid her of her free will for the session.

Also, being sub in the bedroom doesn't mean you can't be dominant out of it. Just impose your will over hers outside the bedroom.

https://www.reddit.com/r/bdsmfaq/

What you're experiencing is far from ridiculous. This is perfectly natural after discovering these exciting new things about yourself, your girlfriend and your relationship.

First things first, communication is key in BDSM. If you haven't already, sit down and have a conversation about the play-session. Both your concerns seem to come from you not knowing how she has experienced things.
Tell her what excited you, ask her what excited her, try to come up with fun thing to add to the next session, etc.
Exchanging experiences and reliving the fun you both had will allow the way you experience BDSM to grow.

Talking will also give you an idea of what your girlfriend would enjoy in being a sub, which in turn will help with the anxiety over doing the "right" thing as a dominant.
Also, know that there's no "right" way of being dominant. All there is to it is having control and that you're free to do as you please (within the constraints of consent, of course). The only measure of "right" is whether you're having fun.

While the bleed-effect is quite possible, it doesn't have to be a bad thing. Even if it happens, it could be a fun addition to your relationship. If it isn't, be open and talk about it. But, allow it some room. By rejecting any bleed straight of the bat, you close off a big path of potentially fun growth.
Bottom-line, if you're open and honest about BDSM, both inside and outside the bedroom, you can make it the most enjoyable experience for both of you.

To answer your last three questions: Have fun. Be open. And definitely see where this ride will take you.

>>17887272
For 1. Google "BDSM for Beginners" to find several sites with good advice on how to start.

For 2. Have the conversation (which you should have had first) about how this is just an erotic game of role-playing for the pleasure and excitement of both, and does not reflect your real-world feelings or attitude for each other.

>>17887272
You are overly paranoid and should just see how it goes for now. If you notice your relationship changing outside of the bedroom in ways you aren't okay with, address it when it comes up.

You could try asking her to send you maledom porn she found hot if you want ideas to try.