Erm be careful. If the rules are still the same you can't ever transfer from a pve server to a pvp one, but can transfer from a pvp to pve one. Most of the best guilds are on pvp servers.
Also I'm hot sure how level 80's can attack you if you're level 5 since you'll be in starting areas until around level 18 afaik, so you can't be attacked unless you enable pvp or attack them.
Also I reccomend pvp servers for the lols

You're always going to get idiots who gank you and will make levelling up harder, but same level world pvp is A LOT of fun