Set up Beatrix

Hello

previously on bitrix was synchronized with 1s unloading goods, now I want to ship everything to bitrix directly, so you need to set up
1. Download catalog (it now exists, but some prices are out of date - in general we want to remove everything and start pouring again, through the download module csv, excel - the module is worth, but the nuances of the download is, as the categories of the store are different in their characteristics and essence, from caps to wheels)
2. about Customers, from registration to check-in to walk to make everything work correctly, check, tweak if you want
3. Payment points/delivery orders (maybe something can be added and improved, paypal for example put as a supplement payment method)
4. Create users: content, warehouse, salesman
generally run the range and the ability to make orders