My dad (55) quit his job thinking that he could find another one quickly, but has been declined every company he's applied for in the last 5 months. He's been sitting at home depressed and I don't know how to talk to him.

Because he had been working there for so long, the company offered him a package since they were downsizing so he took it. The package included a year of his salary, so he that he could find a job to make even more money during this period.
So far everywhere he's applied, he's been declined. Normal people would love to relax for a year and get paid for doing nothing, but he feels that work gives him a sense of purpose.
After being put down mentally by all these rejections, he's resorted to sitting on the couch all day looking at Facebook, playing games on his phone, or watching crappy shoot em up action movies. I can tell he's not enjoying his life.
I really want to help, but things are weird right now. Him and I have a great relationship, but neither of us really talk about anything personal with eachother.
I am extremely busy with my classes, so I don't have time to hang out with him everyday. How do I let him know that I am there for him without directly saying it? What are some resources I can direct him to?
Thanks
TLDR: Dad is sitting at home doing nothing all day. how do I let him know that I'm here for him without directly saying it?
edit: he is a CPA for anyone wondering


Source.