Avoid ninja random invites first of all, as they welcome you only as a number and not as a member. If you want progressing at your own pace, find ones that are casual on this, some hardcore raid FC will impose a schedule for you to come online to raid or else you get shoved with blames (which is the reason for most static's downfall and people quitting raid/this game). You can join the FC to find out if it's good for you or up to your expectations, some FC even lie to you claiming they are "pro" or "friendly" but everyone in there could just be zombies waiting for fresh meat. Leave the moment when they start saying things like "freesshhh meatt" or "braaiinnsS!!"

Also when considering server transfer you might want to consider -where- to transfer, it's going to be hard if you transferred to a wrong one where the timezone isnt suitable for you (like NA -> EU server). You can create another alt character in other server to find a place that you can fit in before you consider transfer.