What is the best way to design UI (specifically UI) for a windowed application and what principles should be followed when designing it?

Question

User interface

Suppose you need to make a user-friendly interface for an application for buying telescopes or other commercial products, what basic principles should be followed so that the user is not horrified at the sight of the interface provided to him?

Answer 1

Look at the interface of any popular online store and do the same.
Similarly, you can look at the templates of online stores.

Answer 2

Sell ​​your telescopes through marketplaces. You have already solved all UI/UX issues.

Answer 3

well, branch 2.4 is not much different, so do it on zabbix

Answer 4

you should find normal it - tishnikov

Answer 5

I saw that your question has not yet been closed, can you tell me which decision did you stop at?