How do i start with Asset Management

How do i start with Asset Management

​IT Asset Management is becoming a pain the butt for me to setup. We have about 30,000 items in our assets right now that were put there by our PO system. We have never used Asset Management, but we need to. I don't want to delete the assest currently there because i was told by support that they will break historical POs but i need to figure out how to remove all the misc keyboards, mice, hard drives, etc that we purchased throughout the years. There is no way to tell if they are even here anymore. If i change them all to disposed they stay in AM just with a different status. Where do i start? how do i make this manageable?
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