I'm not to familar with any websites but books I recomend the author Jay Wiseman. Look around maybe he has a website. Maybe I will to I like rope quite a bit myself he is full of knowledge.
As of tying up remember to wrap rope around limbs and such double wraps saves time more secure and cuts of circulation less. I've wrap rope ( doubles) 3-4 times with 6-8 wraps of rope wrists and such are very secure and safe as well. Anyway I'm off to head my own advice hope that helps ya.
I love the person who can smile in trouble, gather strength from distress and grow brave by reflection. Tis the business of little minds to shrink: but those whose heart is firm and whose conscience approves their conduct will pursue their pricables unto death. - A Thomas Paine quote reworded to include both sexes.