Taking on a permanent job on temp basis?

[n428]

I'm unsure of career path- having finished uni (law) and trying to achieve something in a sport at the moment (couple of years out effectively). However can't do much with the sport until the spring. Have seen a job advertised as sales executive I can do- however it is wrong taking on a full time post when I know that I will probably want to resign in the spring?

Furthermore I don't want to be in sales like this as a career so is it a bad idea to start? I would enjoy the job, the money isn't bad (and its needed)

Any thoughts?