Old MTG player, new to EDH. I could use some help getting into it
Hello folks, I'm an old timer which returned to MTG a couple of years ago after a 19-years hiatus, and I've been pretty hooked ever since. Back when I returned to Magic I was interested in trying EDH, as it seemed like a nice format to get back into and refresh my memory. I bought an used precon and dipped my toes into the format, but I found myself a bit overwhelmed by the vast amount of new stuff and card rules that came out during my hiatus, and I admit the multiplayer aspects were very confusing for me at the time, so I ended up building a Duel Commander and a Premodern deck (there was a big DC community here at the time), and played only these format forgetting completely about EDH altogether.
Recently, the Duel Commander scene in my area has been vanishing (understandably, the meta is in shambles imho) and there were never many players that played Premodern to begin with, so I found myself wanting to try to get back to EDH, as it seems like it's the only format that's currently being played by a decent amount of folks around here. This time I'm trying to be a little bit more prepared, though, and I started following this sub to get an idea about the format. Still, I feel a bit confused about some stuff and I'd like to ask for your kind help.
I built a deck that I have yet to try, which is basically a legend matters aggro with a tiny bit of other themes. The commander is [[Dihada, Binder of Wills]]. Link: https://moxfield.com/decks/kxX4T-YJ1UaABuOWtc61ew
Suggestions about changes and/or additions are welcome.
These are my doubts about it and EDH in general:
My idea is to build up my board as best as I can, then use one of the many tutors to bring in the most useful spell/creature at any given time, considering the state of the board at the time of the cast. I keep hearing about wincons over the sub, and I don't feel like I have a clear wincon besides just attacking with strong creatures. Is this going to be a problem?
Am I trying to do too many things at once? I put a lot of accent on treasure-making cards, reanimators and +1/+1 counters. Do you think it's best to focus on a single one of these aspects, for better synergies?
Despite reading and seeing videos about it, I still find myself very confused by the bracket system. I know close to nothing about EDH but at glance my deck seems pretty strong to me, although it is technically a bracket 2 because I have no combos and I purposefully left out game changers, as I don't think they would alter the fluidity of my deck that much. Would you add maybe a game changer or two, like [[Demonic Tutor]] and [[Underworld Breach]] and call it a bracket 3, or is it a fine 2 as it is?
Etiquette. Multiplayer is so, soooo much different from the 1vs1 I'm used to play. I remember making a guy angry when I first came back into the game, because I felt he was the biggest threat by far and no one was doing anything about it, so I kept focusing my offensive on him. He ended up winning, so maybe I was right, but he kept complaining about that and made me a bit uncomfy. I like to play competitive but I am a good sport if we're all having fun, so I don't mind losing either. Is it considered bad attitude to concentrate your focus on a single player, even if you feel like there's a good in-game reason to do so?
Thanks a lot in advance for your help, and sorry for my janky English.