Building an AMT '69 Barracuda model, need some help

Someone bought me a really nice AMT black '69 Barracuda model. I want to build it with my 5 year old son for something to do.

I haven't built a model in about 30 years! What do I do?

What kind of glue do I buy? What kind of paint? (Testors I believe). What do I do first, take all the parts off the sprus? Should I paint the parts first then glue them together? Any tips?

Thanks.
Neil.