Arduino and 16 or 32 led strips

Led strip i will be needed to build by myself, so it wont be bought anywhere. I need very dense strip. moze than 400 led per meter. So, is there any articles how exactly could i do? What connectors should i use?

Im new to arduino, and im starting learning it right now. So i need to know, is there a possibility to somehow connect this 16? 32? led strips to a single arduino? Especially, arduino nano?

. So i need to know, is there a possibility to somehow connect this 16? 32? led strips to a single arduino?

How many LEDs is that? The limitation is on the ram storage, you need three bytes per LED. A nano only has 2K of ram storage and you need to reserve some memory for other purposes.

Led strip i will be needed to build by myself, so it wont be bought anywhere. I need very dense strip. moze than 400 led per meter

Good luck on that. I understand you can now get smaller LEDs than the normal 5mm square ones. https://hackaday.com/2019/07/10/new-part-day-two-millimeter-addressable-leds/

Are these addressable LEDs or just all the same colour?