How much experience do you have.
Working on cars.
The head gasket although is not that difficult should not be attempted without a good plan.
I've never had any mojor problems when doing head gaskets but you must be familar with it so that it goes back together correctly.
The first time I ever did a head gasket and I'm not a mechanic I numbered everything with masking tape as I pulled it apart.
Put bolts back into holes after you take brackets off this way you don't have a bucket/box full of bolts to try and remember where they go.
ie. if I remove the alternator I put the holding bolts back after the alt is removed now I don't have to remember where they go.
Hope this helps