Axes are one of the most primitive tools going. If learning to tune-up and sharpen one 'is not your bag' then maybe investing in a gas powered saw or some such (that cost lots of money to buy, use, and to maintain) is where you should be headed. This is not necessarily a denigrating statement since millions of similarly-talented-impatient folks have already gone off in that direction before you.
You can cheaply buy an electric portable grinder and use a grinding (instead of cut-off) wheel to reshape the blade but oftentimes greenhorns entirely ruin the piece (temper of the steel and profile of the blade) or reduce the tool to shreds in a matter of minutes.
A hand file and stone can do wonders for you, and learning about wood joints all requires time and patience, and are well worth the effort.