I highly suggest NOT learning on a low-grade guitar. The notes will never be accurate, and it will likely go out of tune quickly while practicing.
If you choose to stick with practicing, your sense of notes and corresponding sounds will be skewed.. Not saying you cannot learn, but i would urge you to do it right.
Long & Macquade has some great ones for cheap, or you can look for used ones on Kijiji. Spend a few bucks and get a proper one.
Just my opinion.
The neck can be warped, frets mis-aligned, To high or low a bridge, string spacing, never mind the poor sound. All add to frustration.
I would think the first thing you would want to do is decide on the type of music you want to play.