First of all, you don't even need to make your IP Static. Not sure why that step keeps being mentioned. I'd be able to help you a lot more if you provided the model of the Router.
When port forwarding, all you really have to do is gain access to your Router(unless you have a Modem that can send a wireless signal, in that case you should check if it will let you port forward). Your router should have a webpage for modifying settings and all. Once you reach the webpage, search the menus to find Port Configuration, Portforwarding or Virtual Servers(either one of these or it could also have another name. Just look for an option that lets you port forward). Go there and on this page you want to specify what ports should be forwarded. Srb2 uses port 5029 so where it asks you to add a port you put 5029. Now it should also ask you for the Protocol. Srb2 uses both TCP and UDP so you want to have these 2 selected. Then there should be an option that allows you to specify what computer you want to be associated with this and it may ask you for an IP Address. All you have to do is put your computer's IP address NOT your computer's Public IP Address. Your computer's IP Address should start with 192. or something like that. Your router may let you search for the appropriate address so check if it does. After you have done all this make sure no firewalls will interfere with Srb2. Save the settings and if you did everything correctly then you should be able to host.
If you need any more help I'd be glad to help you some more.
