Prior to the M50, I had never had the head off of a DOHC engine. I thought it would be a bit tougher than it was. No worries, if you follow the bentley, you'll have no problem.
In terms of tools:
you can either buy a 'cheap' $40 cam alignment tool or just use a straight edge to line things up.
Bentleys mentions a secondary chain guide tool, but two safety pins work plenty fine
In order to remove smaller head bolts from the timing cover area, you'll need to modify a torx socket (grind it down to fit into a deep hole).
Otherwise, nothing to special needed.
The trick (if there is one) is not the cam alignment per say, but setting up the bolts in the cam sprockets. There is quite a bit written on this subject and I know I have a post with plenty of pics out there which details this procedure.
In a nutshell, go for it, you'll enjoy it.
Dave M