Welcome to the board. It is a great place to gather info and improve your skills.
I am in a similar place with my 5yr old grandson. He took his first feral hog this past Nov. using my, (now his), Ruger Compact in .308 with some reduced load 125gr BT's.
He had told me in the early part of last year he wanted to get him a boar hog, so the fun began. Weekend before last he put two shots of three in less than 1/2" at 180yds with it and would have probably made them all cluster if one had not been a different weight bullet.
Anyway, your in for even more fun than you can imagine, just keep the range time short enough to let them work on things but not long enough to get a sore shoulder. We generally shoot 5 - 19 shots then pack it up. So far it has worked out pretty well for him.