EEG data analysis for virtual reality experiment


Hello everybody!

I need help regarding the analysis of EEG data. Briefly, my study aims to measure the mental workload caused while driving a car. To measure the same, I am using a virtual reality tool HTC VIVE and making participants drive in a virtual setup using different driving environments like that of a city, village, forest desert from the game GTA-V. I am using a 32 channel EEG for the recording.
Can anyone help me clarify which steps and statistical analysis should I use? After studying the relevant literature, I found that increase of eeg power spectra in the THETA band over PREFRONTAL areas and the simultaneous decrease of eeg power spectra over PARIETAL areas in ALPHA band happens during difficult driving conditions, thus increased workload. If this is correct, then what should be the next step?
What statistical analysis should I use?

A heartfelt thanks to everyone in advance!