I would go further. not only do not use Chrome; do not install it. I used to have it installed but would find various zombie processes chewing up resources. good bye.
I use Chrome on my SP3 when power isn't an issue. Otherwise, Metro IE11.
I personally don't worry too much about power settings. I keep the brightness down around 40%, maybe a bit darker if I'm on battery and trying to make it last. Otherwise, just use your SP3 as you need it, and once a month let the battery discharge to at least 10%.
And like @sharpcolorado said, don't get too terribly moved into and attached to Win 8.1, until you've given Win 10 a go. It should be out in a couple months.
A big congrats to you for making the plunge. Welcome to the club!