We've all been there - don't lose heart, you can get it done and be the better for it!
25 years ago I had a Toyota 4x4 pickup truck which blew a head gasket (22R motor) so I thought I'd pull the head, replace the gasket, and be back on the road in no time. It was a good plan except for part where I cracked the head and damaged the block when I pulled the head. Seriously, I couldn't have f'd it up more if I tried.