as far as my opinion, I think starting indoors you can give your sprouts the very best chance rather then starting them outside..
It wouldnt take nothing but a bad rain storm, or a simply tree limb to completely wipe out your poor defenseless sprouts outdoors..
NOT like it couldnt happen anyways, but they will be in better shape to handle the elements...
If you want best results prepare your outdoor grow spot ASAP(that is once you have begun your seeds indoors), and get the soil conditioners(wormcastings/guano)and lime tilled into your spot weeks before transplanting..
Even if you dont do it this way your plants shouldnt suffer much shock if you have given them enough growing room in the good soil..
They will slowly grow into the ground, and it wont just be a from Top soil to dirt transplant..
Honestly I didnt do either, and still no problems..
I threw my plants outdoors too early in hindsight, but they still did ok..
This is just the way I would do it now, if I were thinking about growing outdoors..
Remember it is still just a weed of sorts.. We just want to give them soo much love, sometimes we forget this..
Seems that doing everything right and to the letter doesnt always work out the way we would like either..
I have been doing everything "by the book" and have had horrible luck getting sprouts..
I had more luck back in the day when I didnt know wtf I was doing..LOL
BUT to my own defense, Im living overseas, and cant read wtf's in the soil mixes I have been buying.. haha Oh well
I was lucky just to have the one plant I have going now..FFS I pray its a female
LOL
good luck !