Cisco Sg300-10 DHCP and VLAN configuration. How to register incoming IP?

Question

Cisco

In general, there is an SG300-10 (I have not worked with Cisco before, and indeed with such complex equipment) In theory, everything is clear (more or less), with practice it is more difficult. It turned out to make the initial setup, enabled ssh access, connected via PuTTy. And actually everything =) What you need: The Internet came, entered the router, you need to register VLAN (So that the router gets access to the Internet).
Further, there are 2 unmanaged 24-port routers, you need to distribute the Internet to them through ports 1 and 2, preferably via DHCP (if possible). While everything. If you tell me (in Russian) what this piece of iron can do, I will be very glad to read it. =)