Trying to get into Magic so I can share a hobby with my Fiancé but struggling

So recently I (28F) have really been wanting to get into Magic because my Fiancé (23F) plays it religiously and ontop of playing it nearly daily on tabletop simulator, she wants to start going to in person events every single week. She is so excited for the new set releasing this month and I am even buying her the codex? bundle because she wants the rare cards. The new set is up there for her on her fav theme that in magic so this is a really big deal for her.

I want to try and get into magic but am struggling with a few things. one struggle is commander which is what she prefers to play feels way more complicated than regular magic. there is just too many unique cards and it feels impossible to learn. She had me try out and play a commander game with her while using the new green black deck that's releasing this month and i was just totally lost. I know a little bit because i have been trying to learn little by little for the past month or so, but this was just way too much and I straight up just quit midway through the match because i was so lost and frustrated trying to play the new deck she handed me.

I have been doing lots of research as to maybe what decks id like to play, but with her wanting to go do events it makes it a little harder for me to participate cause she wants to start dropping money on the new sets and playing the current stuff. Im really annoyed with the fact that the themes and stuff that I would like esthetically are about to not be able to be played and also they cost way more than the new stuff that I just blatantly dont like. Im sorry im not a tmnt fan, nor was my experience with this new set very fun, and i have no interest in marvel stuff, the hobbit, or star trek.

I feel very frustrated cause I really wanted to be able to share in her excitement and participate in this hobby of hers that she plays for hours every single night after work. I just dont know what to buy or how to participate without feeling like im wasting my money or putting myself through a miserable time trying to play stuff that feels way too hard for a beginner to learn.

Does anyone have advice on how to better get into this hobby? cause I really want to do this for my fiance, we dont share too many hobbies and she has taken the time to learn and enjoy the stuff I am passionate about, and i want to do the same.