Toys can be almost anything. A clothes pin, bottle cap, knotted string, plastic straw or even a crumpled piece of paper.
Give him something you think he has never eaten. It could be the green from celery to pick on or some other fresh fruit or veg that you have in the fridg.
You also have to remember that he is now an only bird and used to others around him. Give him things to see and do for enrichment.
I have

who really don't get enough attention (not saying you need 2), but they have each other and their own little world going on in the cage. Because of this they are not what you would consider cudley. They tweet and try to communicate with me and are the most cheerful sounding in my house. Because they are the smallest kids I have they rarely get out but love it when they do. When they are tired they let me pick them up to put them pack.
You have one and can devote more of your free time to it. Keep it enriched. Put it in a sunny location that you are in a lot, (mine is the dining room - my work area) so you have visual and verbal contact even when it is not direct contact.
When you have time, open the cage door. He might not come out the first few times but will eventually. Once he is tired from flying you can pick him up.
My methods are not like the others in the forum and I wonder if they are annoyed at me for it.
I don't require anything of my kids but to be happy and part of my life. I don't trick train or give rewards. I do teach them hello, come here and help. The rest they have learned like a little kid does just by listening and watching.
Keep in mind that this is how I do it. Others can give you info on other methods.

Rambo

Myrtle

Shadow

Sweetie

Lemone'

Twinkle

Tommy

Tammy

Tweetle Dee & Tweetle Dumb