New to Handicapping

I am new to handicapping.  I have been betting of sports for years, but of recent decided to become serious with it and try my had at handicapping.  I know that it can be and most probably  be difficult.  I am looking to cap NFL using Stats and trends.  I am looking to develop formulas and such.   My question is  what site do you guys get your stats from????

Is there anyone else doing this and would like to walk along this journey together.  So we both do not have to reinvent the wheel???

Thanks

Cardiac

Depending on the sport, there are many websites offering information.  For American sports, I like sportsbettingstats.  Since you have been gambling for years, you must be experienced in handicapping?  Not hard to handicap.  But hard to consistently be profitable in long run.