How do I find a static raid group?

[Ophie-Mio]

People on T12 don't want people just starting out on T10.

This is a lie. There are plenty of forming statics who post that they are willing to bring people up to speed. You just need to be at third coil ready status AND be able to put out your numbers.

"Really easy" is so NOT the case. The statics are hard to start, hard to find, and hard to keep together.

Statics are easy to start. You'll get a dozen tells from DPS alone. They are harder to keep together because all the players are sometimes starting from different places or are at different play abilities. Someone may be willing to be in a static if they've beaten T12 but they won't stick around if the group is being dragged down by one or two players that the leader won't be kicked out.
Once again, statics are most commonly business to people. Yes, some groups are compromised of friends but normally groups only are together/log in/communicate with each other only for raid.

It doesn't matter if the OP is working on T5 or T13

These fights are apple and oranges. You can literally carry four people through T5. T13, you cannot carry anyone. If OP started a PF right now asking for a T5 clear, he'd get people inside it. If he did the same thing for T13 clear, he would get nothing. People are not able to easily clear T13 and need people who they can rely on for it.

getting a static together with people that are more interested with only their own progression

Statics not compromised of friends are generally concerned with their own progression, yes. If someone hinders that, it isn't personal though. They're just removed from the group.

instead of how to build a community and how to help everyone play together is like herding cats.

Statics are not designed for this sort of thing. Statics are group based progression that generally cannot lend themselves to the progression of others in the same content due to lock outs. Some are more than willing to help with older content.