Well it depends on what type of hash. I would say No, its not difficult, but I've done it 1000 times. It might seem weird at first but its really not hard at all.
Just be safe if using solvents (like ISO or butane)
As far as making it...well the best thing to do is read a tutorial....this site is full of them..lol.
Now Im going to direct you to little something called the GrowFAQ. Use it. It is your friend.
GrowFAQ
And more on topic...the Hash/Oil section of the GrowFAQ.
Hash/Oil
Also heres a quick tip...If you ever notice that the sites search function is less the adequate (or just plain sucks
) Then try Google. Seriously, Try it. Make sure all your search filters are off and ask google a question, any question about Marijuana....I can almost guarantee the first 5 hits will be 80% RIU.org and 90% on topic for what your looking for.
Have fun.