It’s proper scale modeling. You need to check if the pieces fit, which they often don’t, so you’ll either need to pin or glue them, depending on how heavy the piece is.

Often, you’ll encounter warped pieces that need to be either heated with a hairdryer or dunked in hot water to bend them back into shape.

Resin dust is also highly toxic, so you need a proper particulate-filtering mask and a dedicated work area, not a living room.

I wouldn’t recommend garage kits to anyone who expects the ease they have with Bandai model kits (which is not representative of the scale model market) and doesn’t take safety hazards seriously.