Well, in my opinion, there are no accepted rules - you decide between the two of you.
Which is the Fundamental Rule of All, really:
being direct, being open, being straight with what you think, feel, want and can offer.
This is a simple deal for mutual benefit. The aim is pleasure, and life-enhancement. The deal needs to be set up in a clear way and both parties happy with it.
So for me, talking and texting is very important. That constant feeling of reaching out and the other person is there and wants to talk about everything with you, that low swell of flirtation, the exploration of each other - that's all part of the connection and the pleasure.
No kissing? No thank you. What is this? A b version of 50 Shades?!
For me, the ideal is a reliable, solid agreement to meet regularly (probably max 2 times a week or it will really take over your life, can work fine on twice a month). This combined with daily texting/voice messages and I know some like video but not for me.
Personally I would not be interested in someone who is in a life relationship with someone else. I prefer a younger guy who has some years experience but is still free to please himself (and me : ).
You probably have to agree at the outset on expectations. There is a danger of getting over-attached. It's kind of natural. Because to have the best sex it does touch not just your body.
So try not to get hurt, and not to hurt the other person. Always be kind. But at some point you may need to be firm, with yourself and/or him.
And remember, the sex is the point of this. To have that uplifting connection, love of each other's bodies, and the health benefits of just being natural and unfettered and worshipful and happy. Like you might love going for a long walk or being in a field of flowers or on a wild heath.
Well, that's how it works for me, anyhow.
And it might seem strange, to walk into a room with someone and immediately start to hold each other. But in many cultures, sex is given shame-free status as being essential, and therapeutic, and respectful of the two participants. So... it's all good.
When looking for a suitable mate, though, you need to make is very clear you want a regular arrangement with a connection, not just a one-off. Because some guys just range around collecting scalps, as it were.
You might have to try a few before you find the right person.
I would be a little careful on Tinder. I'd suggest Hinge as a good source.
And I don't know how old you are, but suggest you put your age range from whatever top age you want to ... 20. Do it.