Good idea to try before you buy but a 10 day tour is very ambitious in an unfamiliar car with very little luggage space or weather protection. If you are tall or wide it may be uncomfortable. If possible rent it for say two days with an option to extend. After 2 days you would likely know if you could live with one. Plenty of good country round Malvern to explore.
The seats are fixed & you would need them to adjust the pedal position to suit your leg length. Bring or buy full waterproofs, goggles, waterproof gloves & ear protection & consider a helmet. You need to be equipped as for a motor cycle minus the armour.
