Is fostering dogs a good idea?

i recently had to re-home my 10 month old collie/GSD mix, she was my first dog and i miss her very much, i am still heartbroken the way things have turned out and i accept that a lively active dog and an inexperienced owner was a recipe for disaster. i have been asked if i would like to foster rescue dogs that have been saved from being euthanised and some that find living in a shelter to stressful. i am still very raw from what happened with my own dog but i am an animal lover and would love to be able to help these dogs. i have two children ages 10 and 8 who have been bought up to respect and appreciate animals and not to pull them around...is it a good idea to start fostering dogs so i can help them and at the same time gain experience and confidence? or will i cause them more stress as i am not very confident and couldnt cope with my own puppy? please help, i want to do the right thing