As for me, I don't think there's much difference between the male and female other than the female being more down to business. Since you've had other dogs before, then I don't think you'll have much of a problem with a Border Collie, as long as you know the needs of the Border Collie. Nell was my first BC, and she's a gem. But if I'm not on my game, like when I was online and lost track of time, she had my blanket in the master bedroom torn to shreds, lol. They love looking for the filler, lol. I had white filler all over the room, lol.
So, I wouldn't be concerned about male or female. My neighbors male BC is just as bonkers as my female. I just recommend that if you are looking into rescue, then spend some time with the BC before you make the committment. Visit several times. Also be open to other BC's as well, and that right one will pop out, and it may be a male, or it may be a female. Just don't jump on the first one you see. Get to know them first.

So, I wouldn't be concerned about male or female. My neighbors male BC is just as bonkers as my female. I just recommend that if you are looking into rescue, then spend some time with the BC before you make the committment. Visit several times. Also be open to other BC's as well, and that right one will pop out, and it may be a male, or it may be a female. Just don't jump on the first one you see. Get to know them first.
It doesn't matter....