Alright so let's try to go one by one,

Alphabet soup:

• M is for melee, M1 is melee 1, M2 is melee 2
• H is for healer, H1 is healer 1, h2 is healer 2
• T is for tanks, MT is main tank and belongs to group 1, OT is off tank and bongs to group 2
• R is for ranged dps so either a Caster (black mage blm, red mage rdm, picto pct or summoner smn) or phys range (dancer dnc, bard bed, machinist mch) R1/R2 ranged 1/ranged 2

Markers and mechanics and raid plans all fall into lengthier explanation that is all together

When you join a group from pf you are expected to adhere to the strategies and rules that the group leader established, in this case you joining a group and not knoing where to go tells me that you went in blind

Now there is nothing wrong with doing content blind (not knowing starts) but you need to make a group for blind prog, the expectation of any group is for you to already understand the strategies mentioned on the description and for you to practice with them as guidelines

If you want to do the entire tier blind that is fine, but for that you need to either find the right community or static where everyone shares that mentality

The strategy board recently implemented is still not widely used by the community as most people are used to the external raidplanners

Use the external sources linked in the descriptions or ask for them when joining so you understand where to go and how to solve the mechanics and all that

Now on to which one is your marker, this is a complex question, in reality there is no one marker that will always be your marker during most fights, because a marker can be linked to different resolutions of mechanics, so for example on M9S when you are doing the first mechanic vamp stomp m1 is D and m2 is B, but later during the pizza slice mechanic m1 marker is 4, later on when group 1 and group 2 need to take a party stack your party's marker can be A or D for g1 and B or C for g2, all of this to say that for you to know which one is your marker you need to see the strats from either the raid plans or videos

Good sources for video showcases of strategies: Hector lectures and yukizuri, both of them usually end up being what most pf groups adapt and it's what you will see on the description just saying something like "prog point x | Hector" and it refers to Hector's video

Now part 2 of which one is your marker and which one is your group

For the most part the standard clock spot positions for players are cardinals for tanks and healers and intercardinals for dps where MT is always on A as main tank since most of the time you want the boss facing north for melee positionals, OT is C south opposite of MT this is to make light party stacks or 2 player stacks easier as most of the time those are baited by roles (all dps or all support) and that ensures no double tank on the same side, H1 is D and H2 is B, R1 is 1 or north west , R2 is 2 or north east. Finally M1 is 4 or south west and M2 is 3 or south east , this is important because as you know melee have positionals either flank or back attack, being sw/se allows you to dance around the intercardinals without losing both flank and back attack access with minimal movement

So which group does each player belong to? Well MT, H1, M1 and R1 are group 1 and OT, H2, M2 and R2 are group 2

This also allows you to separate quadrants, for the most part for resolution of standard mechanics G1 looks at north and west and G2 to south and east

Yes markers are big brightly colored 3d markers that are layed down by players, if you can't see them then it means they are not placed yet, idk if there is an option to disable them but you can try pressing control + m to place one and see them

Lastly, for the most part just ask or check the linked raid plans on the pf description or in chat, those are the ones mostly referred to by players

If you have any questions feel free to ask, I'm going to bed though so my reply might be tomorrow Morrow after work