@KindergartenKop
What do you find enjoyable about it? Are there any particular pitfalls/issues I should be aware of?
Pros: you get to do all the things you liked doing when you were a kid (or is that just me...) - camping, hiking, firelighting, outdoor cooking, visiting places, making new friends, learning new stuff. Plus seeing kids achieve things, sometimes that they thought they couldn't, is really cool. The Scout Association provides a pretty good training programme for new leaders, and the structure of Group and Distric should mean you have plenty of places to ask for help and support. (Make friends with your ADC Cubs!)
Cons: can be an enormous time sink, and if you don't have a good team of assistant leaders or helpers, it can feel like you're shouldering a big burden. I think that delegation skills are really important! Managing the kids' behaviour can be challenging (though as you're already a teacher, you have a head start on this one!) I've found that accommodating additional needs can also be a tricky balancing act if you don't have a lot of adult bodies.
As a few people have mentioned, the Online Scout Manager software takes a lot of the donkey work out of the admin side of things. I absolutely love it and couldn't do without it.
And, ultimately, you're just a volunteer. if it's not working out for you, you can just leave.
As regards having your own kids in the Pack, I always made it clear to mine that when we were at Beavers, I wasn't Mum, I was Eeyore. (We have a Winnie The Pooh naming convention 
) And that I would treat them in the same way that I treated any other Beaver. I usually got one of my ABSLs to supervise them in activities etc (and give them any necessary bollockings) to maintain distance.
Hope this helps!