Yes, That's how I started. Use the submersion / displacement approach to get the air out of the bags.
Hints / links below
https://www.chefsteps.com/activities/simple-sous-vide-packaging
http://www.sousvidelife.com/cooking-sous-vide-without-a-vacuum-sealer
http://www.modernistcookingmadeeasy.com/info/modernist-cooking-blog/more/how-to-use-ziploc-bags-for-sous-vide
http://anovaculinary.com/video-get-air-normal-plastic-bag/
(sorry for the portrait video, but ...)
Edit: And welcome to the brotherhood