First, welcome back!

A lot of the advice in here is sound. There are multiple dummies out there for you to practice on, and you can also get used to tanking by tanking some HW FATEs with your 'bo.

What I'll suggest for rotation is to alternate between Delerium and DA-SE once you've established enmity, as it'll give you good numbers and make managing your MP a lot easier (while also keeping up the Delerium debuff). Don't feel bad if you can't DA every C&S either - sometimes I've found it's more useful for the MP you get back from it.

Practice using Sole Survivor, too. It can be really useful for recouping some MP off an add during a longer fight (which means hey free DA).