New and a little worried

Hi, TLDR: First time feeling like a dom and being so but worried I'll get the wrong and hurt the other person. Any advise?

35F Idian here. Met a 25NB a few months back and we've become friends.There has been a flirty element for weeks now and we recently discussed that we want to bring in kink (sexual and non sexual) into our equation. I've noticed a dom side of me come out pretty naturally for them. And they're a sub as well. This is till now in not just a sexual soft but also slips into conversations about work etc. My tone and delivery shift mid conversations and that impacts their tone etc.

Few questions:

1. Apart from the care about limits, safe wording and consent, is there anything else I need to know for sure?
2. There is also the element of them being s "litte" in the non sexual space and me being in a caregiver zone, I feel that adds a complexity to the possible equation?
3. In our chats/ calls the lines between friendly chat, little caregiver and dom sub (in language) are mixed up and start and send as and when randomly. How do I action that these are not mixing up on and off without clear demarcations for the non sexual kink aspects, the sexual kink aspects and just out friendship.

Thanks in advance for any help.