Welcome to pprune!!!
If you want to get both fixed and rotor licensed I would definatly advise you to get first fixed wing licensed. In an airplane you have much more time to get familiar with all the instruments and learn how to communicate with ATC. It is especially advisable if you train in a high traffic area.
When you start in a helicopter you are at first very busy flying the bird and you will have no time to think for anything else. When you are fixed wing rated, you can somwhat more relax as you are already familiar with procedures, instrument etc.
Have fun!