All the basics still apply and you should get familiar with everything and best to learn flying line of sight before tackling fpv. Having everything on will make any rookie crashes more expensive and flying fpv with a gimbal gives you no feedback on what the craft is doing. Without a gimbal fpv is quite natural as you see the pitch of the quad but with it getting an idea of what its doing will be pretty tricky.
learning to fly without fpv first is important so that you will be able to bring it back if for some reason your video link is lost. Both modes of flight are very different and fpv is easier in many ways but its also q bit tricky to get the hang of.
If you have flown other helis in the past then you shouldnt need too much practice line of sight to get the basic hang of it in gps and atti modes. Also in fpv if you have no osd you wont see any info on the leds so your flying blind in that respect and you want to learn how long it takes for the battery to get to the first and second levels. Use a timer at least in fpv as the last thing you want is to run out of juice and be forced to ditch somewhere. Also using a gimbal for your fpv feed do not attempt manual mode whilst in fpv, in that mode you need to know the exact pitch angle of the quad or you will crash no matter how good a pilot you are.