Need help with my house t gives me anxiety

I need ideas in what to do with my spare room , I technically have 3 rooms in my house but one is a storage room right now . I need to fill the second room and my bedroom is huge I need to fill it as well it gives me anxiety being empty. We don’t have friends or anyone that would stay at our house to need a second room so I’m looking for any ideas for it. I also need help with my room it’s very large I have absolutely nothing it it right now other then a bed and a dresser . What is a good filler for it? I have thought about a makeup vanity but I don’t wear makeup. Please give any ideas it gives me bad anxiety! Tia !