Where to start?

So, for lack of know where to start, I have come to reddit. I'm on a throwaway account because family, friends, and coworkers know my main. If this post is not allowed, I apologize!

So my husband (31m) and I (32 f) have talked at length about inviting a third person into our relationship. I am bi; I've dated both men and women throughout life, but married my best friend who happens to be male. I unsuccessfully tried a poly relationship once, but my boyfriend at the time was extremely controlling and somewhat mentally and verbally abusive about the situation and my girlfriend wasn't interested in ever being with him, so obvious reasons obvious, it didn't work out. Many years later, I told my husband about it when we were just fwb, and he expressed that it was something that he never fully understood, but didn't knock it (he was more upset with how my ex handled it).

Anywho, husband and I have since had two children in the ten years we have been together, still love each other deeply, and support each other throughly. He stays at home with this kids while I work. We currently travel for my work, so we find ourselves in different parts of the states through the year.

Long story short, I kind of miss having female affections and my husband is supportive of it and doesn't mind if he's welcome to get involved or not. I just... do not know how to go about this. We would love to find someone that's willing to tag along with our family, but we kind of want to test the waters out casually in case any of the three parties are uncomfortable.

Does anyone have any kind of advice on how or where to start? I feel as though it's such a "broad specific" situation... I only have the one failed experience with poly relationships and... being from the south... I don't know anyone else who is involved in/with one and kind of scared to ask... hence my being on a throwaway account. Any advice would be greatly appreciated!