I m sure you can fly a big jet no doubt about your flying skills having been in props. But to operate a big jet across distances further in a single sector than your TP whole month combined is another matter. Something you ll have to learn with good attitude mu friend.
Don't listen to him/her.
I fly the 744 presently.
The job is a lot easier than a typical 737/TP job from an operational standpoint. You only do something once every 10 hours...