Good shoes, the flat part of your sole on the pedal, leg just bent not totally straight, seat should be level but you can move it forward or back, fitness comes with use same as anything really, tyres right pressure all helps
Any trips from the pros would be appreciated! Fitness wise, I'm not struggling at all, getting sore knees though, wondering if the seat position is wrong? I'm just in hiking trainers, what part of your feet should be on the pedals? Should your legs straighten completely when pedals down? Yes I am a complete novice!!