In regards to fitting into the schedule I would just ask yourself how dedicated do you feel to learning these aspects in future or how quickly are you trying to learn? Do you see yourself only wanting to dabble in this for a short time or maybe see yourself still doing this down the road for the next 10 years? Even over the next two years you have 8760 hours to practice. You can still do a lot with say 30 minutes each day on either computer graphics learning or drawing. All the better if you can already draw somewhat well ;p
There is much to be said for even the small amount each day that builds up over time compared to say driving large portions of time once every 9 days or something. Either way I would say it depends upon if you can find reference material for what you want to make. if you can get it easily you really have no need to make your own reference material.
