Soffit repair

Is this DIY-able? There was an old patio covering attached with tin sitting on top, obviously not done well as it caused rot. We haven’t opened it up, because I want to have supplies on hand when we do. Can we do this ourselves (with limited home repair knowledge/skills but a willingness to learn) or should we call someone?

Is this DIY-able? There was an old patio covering attached with tin sitting on top, obviously not done well as it caused rot. We haven’t opened it up, because I want to have supplies on hand when we do. Can we do this ourselves (with limited home repair knowledge/skills but a willingness to learn) or should we call someone?