All you can do to improve clutch control is practice, industrial estates and car parks are fairly low traffic areas to practice in. The extra annoying thing you will find about clutch control is that it varies with every vehicle you will get into, so hopefully you will be able to use the same vehicle for all of your driving lessons and your test.
Also use the correct terminology, accelerator, brake and clutch. It is a pedal that makes your vehicle accelerate it has nothing to do with gas, even the fuel is a liquid, not a gas!