hey guys I'm new to editing. I have two cameras both are dslr ones a pentax k50 and the other is a sony alpha 3000. computer is a hp beats special edition with quad core with windows 7, when using hitfilm and any other app in my case the videos lag a great amount. ive been reading about converting the video to be edited but I'm a little confused on everything. what do I need to get started and how would I do so. and if possible free software.