Greetings,
Herald of Xolti indeed is not the easiest class to level up and master for a new player.
It takes quite some time to figure out and need quite decent gear to unleash its true potential.
But if you are worrying about the morph not lasting long enough at low levels, you will be pleased to learn it changes completely once you fulfilled your training with your God Xolti 
If you got down the Avatar tree as being advised by @biglouis, you can be morphed almost all the time between the two morphs you will then have.
3 feats in particular increase the length of your morphs or reduces their cooldown.
From top to bottom:
Demonic Supplication
Demon Within
Desecration
Then to decrease those morph cd even further you can train this specific AA:
Improved Demon Forms
As you can easily see, once properly feated, and AA trained, being morphed all the time wont be a problem anymore if that’s what you really want to do. There are many ways to play a Hox.
If you wish to reconsider giving it up on the Hox, I can only strongly recommend you to have a peak on this excellent guide for any Hox beginner which will with no doubt lift some shades from this mysterious class.
Good Luck!