I bought a brand new Husqvarna chainsaw earlier this year, and I've studied a lot about them - I did use and maintain/repair them a lot many years ago when i worked at the agricultural dealers in Wales, and used them frequently in the forestry, but things change, so I had to re-chip myself.
Points to note regarding electric chainsaw:
Definately need good quality and specifically chain oil - nothing else will do. In a petrol chainsaw you fill up the chain oil first before the fuel - that shows you how much it uses.
Safety helmet, ear-muffs, face-shield, steel-toecap boots, and definately chainsaw leggings/trousers. You may look like a complete prat, but you'll look a bigger prat getting carried away in an ambulance.
Its hard to describe on here, but find out from a professional where the kick-back zone is on the tip of the blade. If this segment of the chain touches anything while you're sawing, it will kick-back, and that is one experience that you don't want!
Ironically enough, having said all that, don't be scared of it. You're in control - not the machine.