One of the reasons I use a full frame sensor DSLR (primarily a canon 5d mk2 and above) is its easier to replicate a correct motion picture field of view with standard lenses .
Probably not something to worry about if you are just learning and APS-C sensor is plenty good for that and the bodies are very inexpensive . Only disadvantage as has already been said is the glass. No point spending your money on APS-C lenses if you eventually go up to a full sensor after a few years.
Also if you spend the money on the full sensor body and lenses you can probably get more of your money back when you sell.
However if you are just wetting your whistle initially the cheaper lenses for APS-C will give you more options for less money.
( but lugging a lot of camera equipment up a mountain is something to bear in mind too!)