As mentioned shooting in both raw and jpg will fill your memory card up super quick. I think I can get around 1000 photos on raw (canon 70D 32gb?? Card), few hundred more with just jpg but can only take around 400 if I shoot in both.
For the record I primarily shoot in raw as I want the full potential of each image.
Finally my 2 cents on camera choice. Buy the one you will use.
No point buying a $10000 camera if it sits in a bag. Using a camera is the best way to learn. Make excuses to go and use it. Take it on walks, take action shots of your pup, annoy your missus and take low light photos playing around at home. Before to long it will start to become more natural.