crm system

Hello guys. I want to run my own company for selling some clothes. Can you give me some advises about good CRM system??

You can use bitrix or siebel. I heard that they have some pros

I think online business is popular in our time. You can easily open own online store. I have a small online shop where I sell cosmetics. I used Salesforce platform. In past I used siebel. But month ago I hired consultant from keynodesolutions here https://www.keynodesolutions.com/ who helped me to understand main aspects of this crm sysytem and gave me some advices how to grow my online store.