Why six weeks? GDC.
In the meantime, let me share some parting thoughts with you. Drawing, like any art, is just another magic trick. If the mind of the beholder cannot bridge the gap between his ability and the picture (or art work) he sees before him, he finds it impressive and amusing. The wider the gap is, the more impressed the viewer is (another obvious factor affecting the effect of the work is the viewer's prior experience with art works of the same kind). If the viewer has the ability to create a picture of comparable quality, he/she knows the secret to your magic trick, and no longer finds your work impressive.
The nature of drawing and painting makes us very susceptible to self-inflicted physical damage. Drawing requires a lot of focus in order to make something of merit. This kind of mental commitment often makes it difficult to be aware of your physical state, i.e. posture and possible pain you may experience. Since it requires a lot of time also, you may mess yourself up pretty bad without noticing it. Heed the warning, kids!