I been an ubuntu user for past couple of years . Now i want to try something new. Switching to manjaro any suggestions?

Fedora arch are good options

Manjaro is arch made simple. It's generally best to get used to arch by either diving deep the rabbit hole or first trying something like manjaro out.
It even has a very nice GUI application for kernels: https://itsfoss.com/wp-content/...

Though there is something to be said about building arch from bottom up. You'll learn a lot about Linux.

If you are going to run Manjaro you alsp need an package manager for the AUR. I personally use pacaur but there are a ton of them some even graphical.

Been using Antergos for a year or so, working great with Nvidia GPU.