Frankly, I think some of the replies here are overly-negative and extreme. All OP is asking for is some advice on clutch and eye coordination - and that comes with practice. So long as it isn’t a physical issue i.e. joint pain which is causing the inability to control the clutch then I would say persevere but have more frequent driving lessons. One every two weeks isn’t enough.
The skills necessary in driving soon becomes part of muscle memory. With more experience you won’t even think about the biting point of the clutch unless moving from stopped on a steep incline. Even experienced drivers will keep the handbrake on until they feel the bite and the car wanting to move forward (or back).
My single-width driveway is on an incline sloping upwards to the garage with trees and shrubs either side. I always reverse onto and up it it so I am reversing up a hill between obstacles. Both observation of the mirrors and clutch control are necessary. It really does become second nature. And don't forget you have brakes. Remember, gears are for moving the car forward or backward. Brakes are for stopping and holding. If you feel the car rolling, engage the brake and try again. Ask your instructor for more practice on this.
As for eBay, of course there are rules about how much someone can make before benefits are effected and tax becomes an issue. Plenty of information online about this. And you don’t have to take sold items to the Post Office. Royal Mail will come and collect on a daily basis and it charges marginally less for postage.