I'm trying to increase my mileage while also improving my form so I dont get hurt so I've been trying to change my running from heal strike to forefoot. I dont have the money to buy the vibrams running socks that help with this so I'm stuck trying to learn with my running shoes. I am now running 6-7 miles and trying to forefoot strike 1-3 miles to get used to it but... it hurts like hell and I run slower, not to mention I fell like i'm tiptoeing and not running.

I usually run 6.4 miles in 58 minutes( I know i run slow) but my times improve as I train and endurance builds.
Should I ditch forefoot and just stay heel strike?
Anyone have any links to help my forefoot journey?
The Tri season is over for me but I have a few foot races coming up so I have 8 weeks to train.