How to create a 2d map?

Question

Game development

Hello everyone
Plz tell me how to create a game map from such a set of tiles?
I can't figure out how to do this because the tiles themselves are not standard sizes.
Now I am making a variant in the unit, cutting the current image and just selecting the necessary tiles, then transferring them to the scene, but something tells me that this is not a kosher way.
I learned how to make maps in tiled, but it’s not possible to select tiles normally, because they are of different sizes, and I’m a noob and just learning
Tell me, plz, who knows
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Answer 1

Now I am making a variant in the unit, cutting the current image and just selecting the necessary tiles, then transferring them to the scene, but something tells me that this is not a kosher way.

What bothers you about it?
So, is it worth learning?
Of course, you can look for plugins in the Asset Store, but something tells me that they are all paid there.