I know aseprite is not yet focused on tile creation and tile map, but then how people usually work with tiles on this software? I was thinking about using the “new brush” option to store each tile but it has very limited space for that. Any tips?
Although I prefer to use Pyxel Edit for tileset work for now, this is my approach in Aseprite: I have a tile-sized grid enabled, draw the tiles on a single layer, already arranged in useful shapes (in fact, I start them as rough sketches of the various multi-tile features I need, such as blobs of grass, cliffs, slopes, etc). I copy individual tiles as needed for additional testing; with the grid enabled, one can double-click a tile with the select tool to quickly select it to move/copy as needed.
When I’m done, I use the same double-click to select to arrange the tiles into a shape more appropriate for a tileset and export (or, rather, copy+paste them onto a larger tilesheet I have for the project).
I only make tilesets in Aseprite though, and thus only need to copy/move tiles around only for testing that they work together. For making full maps with the tiles, I use Tiled or other editors, since they have more powerful tools for placing tiles than would make sense for Aseprite.
If you wanna make tilesets on aseprite, would recommend you to watch this dude that has a lot of tips on how to create them:
You can watch his channel too, he has a lot of videos working on Aseprite 