When working alone on a FigJam, there should be a hand icon in to top right of the screen where if you’re done with something and start waving, you can just high-five that icon to celebrate and get some supportive feedback 
Hi there, I know exactly how you feel! Unfortunately, there’s high five feature for yourself. So, I was wondering if there’s alternative. I just came up with this “Greeting Card” widget (attachment). How about writing a celebration letter for your self and open up when you finish a job!
Also, there’s a playground for this widget: https://www.figma.com/community/widget/1103367100456343900/greeting-card
I hope you’l be able to feel accomplished with this widget or please let me know if you find better solution:)
Thanks,
Toku