'You have chosen a busy route for a new PPL'
My qualifying cross country was Wycombe Shoreham Goodwood Wycombe (I seem to remember the fireman signing to confirm the quality of my arrival at Shoreham) - it's nothing that should faze you if you have been trained right.
Wycombe - Reading - Shoreham should work fine, plan what you're looking for and look out of the window while you're doing it. Farnborough radar makes it easy to get over or through their ATZ and Blackbushe.