I've done this, quite a few times.
Always trust your instincts, and do everything on your terms. A woman looking for casual sex is highly unusual - so if someone doesn't like your terms you can move onto the next one quickly. You're a rare beast!!
Video chat or talk on the phone or do whatever you are comfortable with. Good guys will want to make you comfortable and want you to feel safe so will do what you want.
Again, good guys will use condoms and/or share STD results.
Good guys will NOT insist on coming straight over - they'll meet you for coffee/a drink whatever it is you want first.
Everyone I've met doing this has been lovely - professional normal guys looking for mutual pleasure and fun. Most I've met out first but I have had people straight over and have never felt unsafe, but I have a good bullshit detector and I tell friends what I'm up to.
If someone seems pushy or weird or 'off' in any way then dump them and move on.
If you don't want to share your phone number you can use an app called 'kik' and you share a username instead.
And unlike a poster upthread I would be honest about what you're looking for - you would expect a man to be after all.