Don't think you can queue as 52 anyway. For gearing early on, you're probably better off running dungeons and stuff. Try to unlock all the trials and all the normal dungeons so you can run high lvl roulette and trial roulette, these give decent soldiery every day, and the runs themselves sometimes give good soldiery if someone's new. It's kind of a rough patch to gear up, before the patch you could get full i90 easily but now you struggle quite a bit to get i100 since soldiery drops are lower and the content for them relatively harder, and jumping from no gear to 100 is a huge jump. You can get i90 in the new dungeons but the new dungeons are insanely hard in comparison, you'd probably want 90 before you even do them, especially as a tank, so that's kinda fucked up.
It's kinda stupid tbh, they should have increased soldiery drops.