My pointer is a little over a year old , I worked on training him the first few months I had him then life got in the way and I pretty much stopped , now I’ve got a steady job again and I’ve got the training program and wanna start training him again . Were should I start with him being over a year old ?

I have the training collar and my dog will just drag me around like it’s not even on him . Best ways to work on fixing this ?