Questions (dumb, for sure, newbie here, be gentle

)
1. What the heck is " fishing for MEPs "? I do have
genie+ purchased for each single day park, no hop - just doing 2 days (wed, thu)
2. I really don't want to be flustered with panic reading to find out what I should do on the day I get there, we are going to be satisfied with doing main attractions, just once, we have Genie+, do I really need to strategize to the likes of a rocket scientist to just walk in the park and start walking and hitting the rides? I figure we just do normal line for Millennium Falcon or SW:RotR and while in those lines just queue up LL for something and work our way around the park. We are not doing any little kid rides (3 adults). Hitting the big attractions once and we have all day. Anymore more is OK meaning if we have time to do something twice, we will. We also have no dining plans, just quick bites here and there. So, is this strategy going to kill us or will we be fine.