I'm confused..should I take the OTA or not ?

I'm not rooted, running stock out of the box 5.0.2 tmobile us 64 gb edge.

If i take the OTA to 5.1.1 with the latest build, will i still be able to root and flash twrp with a rom etc?

I am not new to odin but new to the s6 way of things. S5 was so easy to root.