Too Many E-Mail Addresses

I'm going to be honest to you all,

I have over 5 emails. I have my domain "admin" email, I have an old google mail address, and I have a new one because the old one has been damaged beyond repair (or at least beyond repair that i can do in less than 20 mintes.) So I would like to manage all my email on one address, and get no spam in it or anything that I don't want. So I have devised this plan at least with my Google Mail addresses.

The First Address is my Spam Filter, Anything I don't want gets filtered out right there.
After that I have it forward everything that I care about (i.e. Things from Friends, Family, and Newsletters) to my main email.

I do something much the same with the rest of my emails, so that way I can only have what I want. Also a more personal reason that I like this method is because I go to a high school, and I happen to check my email much more at school than at home. The problem with schools is that I have to sign an agreement that allows them to record EVERYTHING. That is why nothing with passwords or anything that could compromise the security of my internet browsing experience (because all of my mail is saved in my other accounts, if someone messed around I would sitll have it).