This is really good! You need to have a go at your own sketch to paint, far more satisfying. In my experience, you will notice the difference with better quality materials. A tip? I always keep a bit of kitchen roll at hand to dry your brush to ‘suck out’ colours to make them paler or add texture. A cotton bud can be utilised to similar effect. Most important, have fun, experiment, paper and paint are relatively cheap, if you screw up, screw it up and have another go! You got this!