My parents also support me in this way. They say as long as you make good out of it...
Hehe, anecdote here.
I had specially booked a lunch with my mother to announce her the news, that I went to CFRC to give my application and that my decision was 100% sure now. I just wanted not bother her when I was not so sure...
So we talk about casual things and others and finally she comes up with "Well, why did you want us to get together finally? Is your girlfriend pregnant?" Just out of the blue, I say "Yes!" She says, "Is that true, you're not kidding me!?" I say "Yes!", again, "I'm kidding you." Haha, she flushed out a second and was ok after. Just right after that, I say, "Well, that wasn't that, that could, but no she's not pregnant. I decided to join up the CF." She answers back with that globulous gaze, "Well, you're kidding me again!?" And this time I say, "No." "Really?", she says on a good note, a bit anxious... and the usual conversation between mother and son, like how dangerous it is, what career perspective, what MOC I chose, deployments, where I could be based, etc...
Just to give my opinion on telling the news. I'm from Quebec and I think this is somewhat rather harder to deal with it in here. I had a lot of fears regarding how the people would react to it. In hindsight, I see that I had a lot of fears that just never materialized in reality. All of my friend and people I told I would join reacted positively to this, to my great surprise!
Moral of this story, go ahead boy!