unclear

very unclear about how to use tagul. tried youtube, but, very confusing. Can anybody explain simply how to use it?

Don't try youtube as there are a lot of outdated tutorials that are obsolete now.

It should be straighforward to use:
1) Create a cloud
2) Add your words to Words table
3) Visualize your cloud (big button at top right corner)
4) Play with settings without any fear. You can't break anything.
5) After you make a change a want to see what effect it will have click Visualize button.

Have fun ;)