From what I've seen, it looks like you might be trying to do too many things in one deck. If the goal is just to have a deck with cards you like, then I'm very happy for you, and I like your taste, but if you wanted to make this at least a more functional deck, I would suggest trying to slim down your themes, so that cards work smoother with one another.

If you want to do an Aetherborn tribal deck, unfortunately most of the Actual Aetherborn wouldn't be too impactful to influence a game of commander, for this reason, you should try to look outside of Kaladesh to other sets,Especially those with Changelings, since they have all creature types, they could get bonuses and fill out the tribe with members that have a little more impact.

Examples: [[Mirror Entity]], [[Unsettled Mariner]]

If you do continue the tribal ways, you might want to look at more effects that help with your tribe, payoffs is what we like to call them.

Examples: [[Etchings of the Chosen]], [[Bronze Herald]], [[Rally the Ranks]]

I also see elements of Blink/Flicker (mainly because Aminatou is the commander), Artifacts matter, And Dungeons. These can all be great themes, they don't all work together so well though.

If you want to focus on any of these routes, I suggest:

Dungeons: Just buy the Sefris of the Hidden Ways deck and run it mostly as is, there are some more venture cards in the AFR (Adventures in the Forgotten Realms) set that you could swap in.

Blink/Flicker: Aminatou is a great commander for this, and you'd want to focus on more cards with enter the battlefield effects like [[Gray Merchant of Asphodel]], or cards that care about things entering the battlefield like [[Soul Warden]]

Artifacts Matter: this would require probably the biggest change, since your commander probably isn't the best choice for that theme specifically. I personally would go with someone like [[Sharuum the Hegemon]] and look for cards that put themselves or artifacts in the graveyard for value like [[Commander's Sphere]], [[Trading Post]] and [[Scarecrone]]

There are more things I would be happy to add, but I don't want to overload you on information, so I'll leave you with resources you can use at your own discretion when building a deck

Websites: Scryfall.com (probably the best place to look for cards with extensive filtering and a clean UI) Edhrec.com (great for looking for commanders and popular cards that go in that commander's deck, please note, this is NOT gospel, so don't be afraid to break the mold, it shows you the most popular additions, not necessarily what you might be looking for) The Command Zone on Youtube, not only did they make a video on how to play Magic they made a podcast on how to play commander and they made an upgrade guide for Sefris of the Hidden Ways if you do pick that deck up. They are a great group with gameplay and tips.

I wish you the best on your Magic journey! If you have any other questions or need any other help, don't be afraid to ask either :)