Delilniya

Hello there, I am new to the world of security systems and could really use some guidance from the experienced folks here. I run a small retail shop thats about 1,500 square feet in size, and I am looking to upgrade our current security setup, which is quite outdated. I want something that offers robust protection but is also user friendly and does not break the bank. I would like cameras that provide clear footage during the day and at night. Are there specific brands or models you recommend for good quality video without excessive storage demands? Is it worth integrating motion sensors and door/window sensors into the system? If so; are there any wireless options that perform well? I would like to monitor the system via my phone or laptop when I am not on site. How reliable are these features across different systems? Should I go for a professional installation; or are there reliable DIY options for someone with limited technical experience? I have been reading about some all in one solutions like Hikvision and Dahua; but I am not sure if they are overkill for a small business like mine. Are there other systems you would recommend that balance performance and cost? Also, I have gone through this post; https://www.thesecurityinstaller.co.uk/community/topic/46908-seeking-advice-on-upgrading-home-system/ which definitely helped me out a lot. Lastly, what are the common pitfalls or mistakes I should avoid when choosing and setting up a security system? Thanks in advance for your help and assistance.