going from 4.4 to 5.1 Few paranoid questions

I am currently on mahdi rom (kitkat 4,4) and want to go onto a 5.1 rom.

My question is do I just flash like always (wipe everything data cash etc) or do I need to do something else like flash another version of twrp

if I have to reflash another version of twrp(forgive me I havent touched gpad in 5-6 months) do i just flash the twrp zip or is there some hoops I have to jump through!

Thats it! thanks for your patience :)