ProTools is INSANELY expensive and is a resource hog. ProTools is the Digital Audio Workstation (DAW) equivalent of Gibson and Fender - overpriced and coasting on name recognition while their quality control continues to slide ever farther down. There are a LOT of worthwhile DAWs out there, but the one I use and the one I recommend is Reaper
For home use, it's only $60US for two full versions. Version 6 will be out shortly, so download 5.99, use it on the evaluation license (unlimited) until 6 comes out, and then buy 6. I bought Version 4.22 in either 2011 or 2012, and I won't pay again until 6 comes out. Yes, the versioning lasts that long. There's a great community around it, it's VERY versatile, professional, and efficient, and did I say CHEAP? Best money you can spend on home recording, IMO.