prolly start with obtaining a repair manual, it really is not that hard to do a head gasket on these cars, you got the 1.9 in it so those aren't too bad, you just gotta take the timing belt off, alternator bracket and all that, coolant lines etc, take all that off, just take the throttle cable off, wiring harness for the injectors, disconnect the fuel hoses at the rail, and you can take the head off and then with the head out it's easy to take the intake off when outta the car.
start with getting a repair manual, I personally like the haynes manuals myself, follow the instructions of that and you can do it!