On your profile, you’ll see LSI and BSI with numbers after it.
LSI = Energy + 2*Stam and caps at 7 – get it to 7 ASAP
BSI = Attack + Defence and is only really important if you want to go into PvP
“Tagging” raids is essentially contributing an insultingly low amount of damage to a raid – like hitting 100K on a raid with a billion health. Doing it won’t earn you any friends but if you only care about the badge it’s a nice way to get some better equipment and generals/troops for your legion.
Joining a guild is self-explanatory. It allows you to spend your honor points on attacking guild raids.
“BB” could refer to any number of legions, but, again, if you’re hunting for the badge then running, it shouldn’t make much of a difference – just pick something that allows you to have lots of troops and generals, really, for the badge.
“Z9” (or zone 9) simply refers to the ninth questing area and the bosses you find within. I wouldn’t bother – I’d hit lots of Erebus the Blacks and other smaller raids to gain a lot of stat points to pump up stamina, then later attack. (1Attack = 4RaidDamage per stamina point, 1Defence = 1RaidDamage per stamina point.)
Finally, I’d also consider raising your health to at least 500… progressing in DotD takes long enough without having no health and no money.
Hope I’ve been at least moderately helpful.