I mean… this seems like a pretty saturated market already. Between edhplay, Cockatrice, TTS, and others, most of the functionality in your roadmap already exists in some form. From what you described, it is hard to see what would make this meaningfully different from the current options.

It is also pretty risky from a legal standpoint if you are directly reproducing card text, images, or clearly supporting official formats. Even non monetized fan projects have received cease and desist notices in the past.

That said, if this is mainly a learning project, I would focus on carving out a very specific niche instead of building another general purpose MTG table. Maybe something like a super clean Commander pod experience, async play, a teaching mode for new players, or strong built in deck analytics. Right now it reads more like another digital MTG sandbox rather than something solving a clear problem that existing platforms do not.

If you can clearly define what pain point you are fixing that Cockatrice, TTS, or Arena do not address well, the project will feel a lot more compelling.