I will start

someone will finish
First off, a good screwdriver that won't chew up the action screws .
Start by using a piece of paper to see if the barrel is floated, mark where its not on the outside with a removeable chalk/pen whatever, just for ref point to remove material.
Once thats done, take the metal off. You may see where the metal contacts the wood by looking into the channel, if not no worries, The channel will have raised areas that are from the factory , sand away with 60 or 80 grit. This is the point where you have to lay the metal back in the action , no need for screws, it will set there nice, do the paper between the barrel and action again , mark , sand , mark etc ... till your sure its free floated.
Caution , do not sand the sides of the stock which will make a gap barrel to wood on the side.
Once you been at it for a while , look from the muzzle end at the wood to barrel fit, you will see if it flows nice from forend tip cap to rx. both sides.
Gap on the sides shoould be almost not visible. Bottom of the barrel to wood you can have a bit more space .002 maybe still not visible to the eye very much, thats what you want.
Screw it down, firm , don't over torque it, then try the paper trick again. If it snags a bit, take note of where, sand, try again.
Once your happy , use some clear finish to seal the sanded area.
Now if you want to bed the action , its better to do that first
