At 73, finally admitting I'm ready to join the ebike world but want to prioritize exercise and bike handling over max power and battery life. After considering some of the newer, light weight factory bikes (e.g., Specialized Turbo Levo SL), would appreciate suggestions to adopt similarly rated components (approx 350 watt/50 Nm motor and 320 Wh battery) to convert my 2020 Giant Tance Pro 3 (XL frame size). Thanks.